PECRON 200W/36V Solar Panels Kit for Portable Power Station Off-grid Camping RV
QUIET GENERATOR & ECO-FRIENDLY CLEAN POWER: Build up your Portable-Solar-Generator System together with Pecron power station (sold separately). Ideally suited for outdoor life and even unexpected power outages. HIGH CONVERSION EFFICIENCY SOLAR GENERATOR: High conversion efficiency up to 23%, turn more sunlight into clean energy and perform better than conventional panels in hot weather. UNIVERSAL SOLAR CHARGER: Equipped with universal M–C4 connectors that can connect easily to most solar compatible devices. You can also get two of them in parallel to charge our 1000W and above units. Lightweight & Sleek Design: Weight only 17.6lbs, super-thin, folds easily and in turn doesn’t take up a lot of space. The foldable design makes it easy to transport and conveniently fits in the trunk Features:QUIET GENERATOR & ECO-FRIENDLY CLEAN POWER: Build up your Portable-Solar-Generator System together with Pecron power station (sold separately). Ideally suited for outdoor life and even unexpected power outages.HIGH CONVERSION EFFICIENCY SOLAR GENERATOR: High conversion efficiency up to 22%, turn more sunlight into clean energy and perform better than conventional panels in hot weather.UNIVERSAL SOLAR CHARGER: Equipped with universal MC4 connectors that can connect easily to most solar compatible devices. You can also get two of them in parallel to charge our 1000W and above units. Lightweight & Sleek Design: Weight only 17.2lbs, super-thin, folds easily and in turn doesn’t take up a lot of space. The foldable design makes it easy to transport and conveniently fits in the trunk of your car or any storage space. Specifications:Model : PECRON PV200Cell Type : MonocrystallineNominal Power :200W±5%Operating Voltage : 38.8±5%Operating Current : 5.24A±5%Open Circuit Voltage (Voc) : 45V±5% Short Circuit Current (Isc) : 5.66A±5%Cell Efficiency ≥22%Working Temperature : -20°C~+60°CWaterproof grade : IP67Dimension (Unfolded) : 597*610*42mm/23.5*24*1.7inDimension (Folded) : 2220*610*27mm/87.4*24*1.1inWeight : 6.2kg/13.7lb Package:1X Pecron 200W/36V solar panel Note:Store method:When the solar panels are not in use, please store them upright,don’t stack heavy and sharp objects on them, so as not to damage the solar panels. and avoid placing them in places with standing water.Pecron StoryPaymentShippingFeedbackContact usPecron StoryPECRON design, engineer, produce and sell products ourselves globally! Today, we have a wide range of battery-powered generators from 200W to 2,000W to satisfy the needs of a diverse group of customers such as campers, explorers, RV or boat owners, survivalists, disaster relief workers and etc.Payment1.Money or Postal Orders / Personal Cheques / Cash payment are not accepted. 2.Payments are expected within 7 days after the final winning auction or place order. Note: Paying by eCheque through PayPal can delay your shipment by up to two weeks while payment clears through the PayPal system (check with PayPal on the expected completed date). Once your eCheque payment clears, your item will be dispatched within 48 hours.ShippingShipping Information 1.Items would be shipped from Local US warehouse. 2.Usually takes 1-5 days by Fedex. 3.We despatch all orders in working business day. Weekends orders will be sent in next Monday morning. Hope get your understanding. (Saturdays, Sundays and public holidays- these do not count as business days)FeedbackWe will work try to help with your purchase, we sincerely hope that you could leave us a positive comment Green Color and 5-star(Yellow color)Detailed Seller Ratings ,We will automatically leave positive feedback after received positive feedback from you. If, for any reason you are not satisfied with your purchase, please contact us through «My Messages» or «Ask Seller Questions» before leaving neutral or negative feedback. PLEASE DO NOT leaves us 1, 2, 3 or 4-star Detailed Seller Ratings because they are equal to negative feedback. Please give us 5-star rating positive feedback, thanks in advance~Contact us Welcome to Pecron Store 1.Pecron eBay official Shop, with Authoritative Quality and Resonable Price. Buy More Save More. 2.Welcome to wholesale and purchase,If you have any question ,Please contact us via ebay message. 3.We will reply you within 24 hours.(except weekends and holidays). Notes:Every day we get hundreds messages,if we reply you late,please wait patiently. We are so happy to answer you AS SOON AS POSSIBLE. Thank you! if any question in our service or products, please contact us first ,We are pleased to help you to solve problem.
Set of 1 Unit Solar Panel Bracket Kit Bracket Mounting Solar Photovoltaic U-Rail
Description： –Material: Made of high-quality aluminum alloy material, lightweight, high load-bearing capacity, strong corrosion resistance, suitable for all environments –Wide application: the solar panel installation kit is applicable to the installation of most solar panels, such as Flat roof, car shed, garage, wall, floor, ship, etc –Easy installation: The solar panel installation kit is easy to install, saving time and labor costs –Waterproof rubber pad: The bracket is installed with a waterproof rubber pad between the roof and the guide rail to prevent the solar panel bracket from sliding and reduce roof leakage –U-shaped guide rail design: The guide rail is U-shaped and can be installed horizontally and vertically, making the direction of the guide rail more in line with your requirements 1 Unit Set Package include： 1x Rail 3x Screws 3x Rubber pads
theanalogguy.com light seeking Solar Tracking Motor Control Unit EST1 EST1-10A
theanalogguy.com or the analogguy light seeking Solar Tracking Motor Control Unit EST1 EST1-10A. Apparently, it causes a motor to turn something, presumably a solar panel, to always face the sun. According to the analogguy website, here’s the details: The EST1 is a single axis light seeking solar tracker control housed in a weatherproof enclosure. When mechanically affixed to a tracking array and connected to its drive motor, it will allow the array to track the unobstructed sun within a degree. The EST1 can be mounted anywhere on the tracking array as long as it receives unobstructed sun. The correct mounting orientation is with the cable end of the box pointed south. The drive motor or linear actuator must have built-in limit switches. Input voltage range: 10V minimum, 36V maximum. Maximum motor run current: 10A (it can handle short pulses to 20A). They sell for $300, so get it here much cheaper. I assume it’s used, but it could be new. Free shipping in the US.
12V 100Ah 200Ah 300Ah 24V LiFePO4 Lithium Battery Deep Cycle for Solar Off-grid
12V 100Ah 200Ah 300Ah 24V LiFePO4 Lithium Battery Deep Cycle for Solar Off-gridDescription: 🔋 【Grade A Cell & 10 Years Lifetime】TCBWORTH lithium iron batteries have exceptional quality since they are manufactured by Automotive Grade LiFePO4 Cells with higher energy density,more stable performance & greater power. 🔋【Five Year Warranty】 TCBWORTH has local warehouses in US, Any questions can contact us and we provide a FIVE years warranty. 🔋【Lighter & Long Lifespan】 Lithium batteries are more compact and have a longer life than lead batteries of the same capacity. It is about 1/3 of the weight and lead battery, and has a lifespan of about 10 times that of 4000 to 10000 cycles. By using it correctly for a long period of time, you can reduce the cost of charging and discharging each time.🔋 【 Eco-Friendly】Solar panel is the best partner Solar charging Use multiple home appliances such as electric pods and electric fans at the same time. It is very eco-friendly because it uses natural energy!🔋 【BMS Protection】Built-in BMS (Battery Management System) for: over-charging protection, over-discharging protection, high temperature protection, short-circuit protection, over-current protection. And keep the balance between cells.IP65 waterproof rating for versatile indoor/outdoor installation.🔋 【Multiple Applications】LiFePO4 lithium batteries can be used for RV, trolling motor, camping, marine, backup power, solar home off-grid system, lighting, TV, electronic robots, speakers, coffee makers, air conditioners, refrigerators, heaters and so on.【 Packing List】 1*LiFePO4 Battery 2*OT Ring Connector Terminal 1*Manual Please be noted: battery charger is not includedNote: This battery has two kinds of cell design, prismatic or pouch cell (soft pack) designs,production batch is different, the cell is different.Two kinds of random shipping, the difference in the cell does not affect the use of the product, is the difference in process design. PaymentReturnDelivery detailsAbout usContact usPaymentWe accept PayPal payment,PayPal Credit,Credit card or debit card and so on. We will leave a positive feedback immediately after payment is received. We appreciate a positive feedback as much as you do. If for some reason there is any issue with the purchase, please contact us prior to leaving feedback, we will be glad to work together and provide a satisfying solution.ReturnAll of our items are backed with a 30-day return policy. We ensure all our items are new and in excellent condition prior to shipping. In case you receive the item that is not to the standards above, please contact us via eBay messages. All returns must be in new original condition as received and should be shipped with delivery confirmationPlease note that all returns must be pre-approved by us. Unauthorized returns will not be accepted. If you need to return, please check twice to confirm the item not work and contact our customer service representative, let us know the detailed problem and send us some.Delivery detailsIf you do not receive the item in the estimated time, or the parcel is broken/missing, please send us a message before you open a case/return, we will try our best to solve it.About usTCBWORTH is a manufacturer and wholesaler of renewable energy products, and we specialise in energy storage batteries. We are committed to providing high quality LiFePO4 batteries with advanced raw materials and superb craftsmanship. We want our customers to use power more conveniently in outdoor, yard, camping, hiking and fishing, making our life more convenient. We advocate green environmental protection and provide users with better products and services. Contact usWe have the most powerful after-sales service to solve all kinds of problems you encountered about the product, help you better use our products, answer your doubts, in order to bring a better experience.
1.5W 12V Small Cell Battery Solar Panel Module Epoxy Charger
We accept PayPal only. •Please understand that for variation listings, there is a drop down menu for you choosing the desired items. We are unable to change any content of your order based on the eBay checkout note or PayPal message. •Please verify your address during checkout . You may not be able to change the shipping address once the payment is completed due to the shipping status. •If you are paying through Paypal using eCheck, please note that your item can be shipped only after eCheck has cleared. We accept PayPal payment and all major credits through Paypal only. •To avoid an unpaid item dispute, all payments must be received within 7 days from the end of the auction. We ship all the orders from USA For US orders, economy (est 5-10 days) shipping is FREE AND FREE tracking number Returns: 30 DAYS FREE RETURN! Contact Us: If you have any questions or concerns, you can reach us through eBay messages. We appreciate your business and if you are satisfied with our service, please provide positive feedback and rate the details of the transaction. Our goal is to make sure you are a satisfied buyer so please give us the chance to do so should anything go wrong with your order. Please contact us before leaving any negative or neutral feedback。 Shipping: We ship to your eBay registered address only. Items will be shipped within 24 hours when payment received. All items are shipped from our USA warehouse in NC, Shipping time only 2-7 business days with tracking number. We ship from US to US. Orders usually ship within 1 business day after payment is received. Copyright of EZcart LLC. All rights reserved. Powered by SoldEazy
12V/24V 100A MPPT Solar Panel Battery Regulator Auto Charge Controller Dual USB
8 Pack 12V 100Ah LiFePO4 Deep Cycle Lithium Battery 100A BMS for RV Solar panels
2 Pack 12V 100Ah LiFePO4 Deep Cycle Lithium Battery 100A BMS for RV Solar panels Product description: Lithium iron phosphate batteries are a mature alternative to lead batteries and have all the advantages of lithium iron phosphate technology. [Smaller and lighter]The weight of lithium batteries is 1/3 of the weight of lead-acid batteries, which is easy to carry and install, and is an ideal choice for outdoor camping and indoor installation. [BMS protection]TCBWORTHY battery has an integrated BMS (battery management system), low self-discharge, can prevent overcharge, deep discharge, overcurrent, overload, short circuit, self-balancing of cell voltage, high temperature discharge cut off，charge protection at low temperature [Wide application]The LiFePo4 lithium battery is safe, efficient and portable, suitable for camping, RVs, caravans, electric boats, tool trailers, solar panels, children’s vehicles or can be used as a backup power supply. [10-year lifetime]We are committed to providing you with satisfactory-service. We provides 5-Year-after-service for this 12.8V 100Ah Lithium battery with responsive and satisfying customer-service. A proper solution will be provided to any problem within 24hrs for delivery, battery and problem during using and any other questions. Specifications: Upgrade Parts/Accessories: Class A Material: lithium iron phosphate Standard charging current: 20A Max continuous discharge current: 100A Voltage: 12V Maximum Protection Voltage: 14.6V Final Voltage: 10V Clamp: M8 Charging Temperature (℃): 0~45℃/32°F~113°F Discharge Temperature(℃): -20~60℃/-4°F~140°F Storage Temperature(℃): -10~50℃/14°F~122°F Product Dimensions:332*176*220mm Recommend Charger: Charging Voltage: 14.2v – 14.6v Charging Current: <0.5C Weight: 10.5KG Package contents: 2* 12V 100Ah LiFePO4 battery 2* Product Manual 4*200A ring crimp connectionMatters to note when using. 1. Please fully charge the batteries before connecting in series and parallel. 2. Maximum support 4 battery packs in series, more than 4 batteries may be permanently damaged. 3.Prohibit reversing the positive and negative terminals, reversing the terminals may damage the battery. 4.Prohibit charging over the maximum charging current, over this current may cause permanent damage to the battery. 5. Prohibit exceeding the maximum discharge current discharge, exceeding this current may cause permanent damage to the battery. 6. Prohibit exceeding the charging voltage to charge the batteryPaymentReturnDelivery detailsAbout usContact usPaymentWe accept PayPal payment,PayPal Credit,Credit card or debit card and so on. We will leave a positive feedback immediately after payment is received. We appreciate a positive feedback as much as you do. If for some reason there is any issue with the purchase, please contact us prior to leaving feedback, we will be glad to work together and provide a satisfying solution.ReturnAll of our items are backed with a 30-day return policy. We ensure all our items are new and in excellent condition prior to shipping. In case you receive the item that is not to the standards above, please contact us via eBay messages. All returns must be in new original condition as received and should be shipped with delivery confirmationPlease note that all returns must be pre-approved by us. Unauthorized returns will not be accepted. If you need to return, please check twice to confirm the item not work and contact our customer service representative, let us know the detailed problem and send us some.Delivery detailsIf you do not receive the item in the estimated time, or the parcel is broken/missing, please send us a message before you open a case/return, we will try our best to solve it.About usTCBWORTH is a manufacturer and wholesaler of renewable energy products, and we specialise in energy storage batteries. We are committed to providing high quality LiFePO4 batteries with advanced raw materials and superb craftsmanship. We want our customers to use power more conveniently in outdoor, yard, camping, hiking and fishing, making our life more convenient. We advocate green environmental protection and provide users with better products and services. Contact usWe have the most powerful after-sales service to solve all kinds of problems you encountered about the product, help you better use our products, answer your doubts, in order to bring a better experience.
12V 300Ah LiFePO4 Lithium Battery 8000+Deep Cycle for RV Solar Home Off-Grid
12V 300Ah LiFePO4 Lithium Battery 8000+Deep Cycle for RV Solar Home Off-Grid Description: 【LiFePO4 Battery】12V300Ah lithium iron phosphate battery crafted from premium (LiFePO4) cells, it boasts a 3.84kWh energy density, ensuring stable performance, enhanced power, and exceptional quality. With no memory effect, it can be expanded to 48V and 300Ah in parallel and series, catering to RV, solar, and home energy needs. Perfect for solar homes, RVs, camping, trolling motors, and off-grid systems, it offers hassle-free maintenance. 【10-year lifetime 】We are committed to providing you with satisfactory-service. We provides 5-Year-after-service for this 12.8V 300Ah Lithium battery with responsive and satisfying customer-service. A proper solution will be provided to any problem within 24hrs for delivery, battery and problem during using and any other questions. 【BUILT-IN 200A BMS 】200A BMS Protection: 12V 300Ah battery built-in upgarded 200A BMS (Battery Management System) to protect it from overcharge, over-discharge, over-current, and short circuit with excellent self-discharge rate. Built-in high-temp/ low-tem cut off prevents charging/ discharging When the temperature reaches a certain threshold value. 【Grade A Cell 】TCBWORTH lithium iron batteries have exceptional quality since they are manufactured by Automotive Grade LiFePO4 Cells with higher energy density,more stable performance & greater power. 【Purchase Precautions】Kindly note, this 12V 300Ah battery is tailored for energy storage, not vehicle starting or powering golf carts. Ideal for home energy storage systems, RVs, travel trailers, portable TVs, trolling motors, and more. Specifications: Brand: TCBWORTH Charge Method: CC/CV Charge Voltage: 14.4V±0.2V Recommend Charge Current: 40A (0.2C) Cell: LiFePO4 Battery Nominal/Usable Capability: 300Ah Nominal Voltage: 12.8V/12V Energy: 3840Wh Cycle Life: ≥6000 times BMS: 200A Max. Continuous Charge/Discharge Current:200A Max. Discharge Current 5 Seconds: 400A Max. Continuous output power :2560W Max. Continuous Load Power: 1280W Internal Impedance: ≤20mΩ Terminal: M8 Certificate: CE ROHS MSDS UN38.3 Upgrade Parts/Accessories: Grade A Material: Lithium iron phosphate Packing List： 1*12V 300Ah LiFePO4 Battery 2*OT Ring Connector Terminal 1*Manual Please be noted: battery charger is not includedFeaturesFlexibleManufacturer Warranty10 YearsMPNDoes not applyProtection PropertiesOvercharge Protection, Overcurrent Protection, Short Circuit ProtectionBMS200ANominal Voltage12.8VVoltage12VUnit TypeUnitItem Length385mmSolar TechnologyPolycrystallinePower SourceSolarSize385*190*245mmCountry/Region of ManufactureChinaVehicle Service TypePassenger Car, Scooter, TrailerMaterialLithium Iron Phosphate (LiFePO4)Amp Hours300AHWeight24.7KGModelTCB-12V 300AhChemical CompositionLithium Iron Phosphate (LiFePO4)Charging ModeMPPT (Maximum Power Point Tracking)Wattage2560WApplicationSolar/Wind DevicesCurrent Rating16-20 ACurrent TypeAC/DCCurrent Output200APower2560WUnit Quantity4System ConfigurationOff-GridResistance PropertiesDustproofBrandTCBWORTHConnection Cable7AWG Copper CableColorBlackInitial lmpedance≤20mΩTypeN
LiFePO4 12V 100Ah Lithium Battery 100A BMS Solar Off-grid Trolling Motor Boat RV
LiFePO4 12V 100Ah Lithium Battery 100A BMS Solar Off-grid Trolling Motor Boat RVProduct description: Lithium iron phosphate batteries are a mature alternative to lead batteries and have all the advantages of lithium iron phosphate technology. The storage system has been specially developed to fully meet today’s high demands on batteries and can offer maximum safety and long-term availability even with regular deep discharge. This technology can achieve an extremely long service life, making these batteries ideal traction batteries, and it can also significantly reduce weight, enormous energy reserves and stable voltage even under extreme loads. [Smaller and lighter] The weight of lithium batteries is 1/3 of the weight of lead-acid batteries, which is easy to carry and install, and is an ideal choice for outdoor camping and indoor installation. [BMS protection] TCBWORTHY battery has an integrated BMS (battery management system), low self-discharge, can prevent overcharge, deep discharge, overcurrent, overload, short circuit, self-balancing of cell voltage, high temperature discharge cut off，charge protection at low temperature [Wide application] The LiFePo4 lithium battery is safe, efficient and portable, suitable for camping, RVs, caravans, electric boats, golf carts, tool trailers, solar panels, children’s vehicles or can be used as a backup power supply. Specifications: 1.certificate: CE ROHS MSDS UN38.3 2.upgrade parts/accessories: Grade A 3.material: Lithium iron phosphate 4.max continuous charging current: 1C 5.max continuous discharge current: 1C 6.peak discharge current: 2C in three to five seconds 7. voltage: 12V 8.maximum protection voltage: 14.6V 9.final voltage: 10V 10.connection: M8 11.charging temperature: 0℃-45℃ 12.discharge temperature: -20℃-60℃ 13.storage temperature: -20℃-45℃ 14. store at ≥50% capacity, recharge every 3 months Battery weight reference: 12V 100AH G.W. (gross weight):11.3 kg Battery size reference: 332*176*220mm(L*W*H) Package contents: 1* 12V 100Ah LiFePO4 battery 1* Product brochureBrandTCBWORTHMPNDoes not applyVoltage12.8VMAX DISCHARGING CURRENT100ACharging and discharging parametersBelow and see product detailsBattery Size1280WhCHARGING VOLTAGE14.6VChemical CompositionLithium Iron Phosphate (LiFePO4)MAX START-UP CURRENT:200A 1000msCHARGE TEMPERTURE0℃ to 50℃SHORT-CIRCUIT CURRENT>200AAmp Hours to choose100AhTypeLiFePO4 batteryChemistryLiFePO4Amp Hours100AhModel No.12.8V 100AhMAX CHARGING CURRENT100A DISCHARGE TEMPERTURE-20℃ to 60℃Application 04Solar System, Home Alarm Systems, E-ScootersSTD CHARGING CURRENT20ACountry/Region of ManufactureChinaApplicationHigh Drain Devices, Solar/Wind DevicesApplication 03Fish Finders, Ice Fishing, Camping,Application 02RV Battery, On/Off Grid Solar System, Solar/Wind Devices
12V 100Ah LiFePO4 Deep Cycle Lithium Battery 100A BMS for Camper Van Off-grid RV
12V 100Ah LiFePO4 Deep Cycle Lithium Battery 100A BMS for Camper Van Off-grid RV Product description: Lithium iron phosphate batteries are a mature alternative to lead batteries and have all the advantages of lithium iron phosphate technology. [Smaller and lighter]The weight of lithium batteries is 1/3 of the weight of lead-acid batteries, which is easy to carry and install, and is an ideal choice for outdoor camping and indoor installation. [BMS protection]TCBWORTHY battery has an integrated BMS (battery management system), low self-discharge, can prevent overcharge, deep discharge, overcurrent, overload, short circuit, self-balancing of cell voltage, high temperature discharge cut off，charge protection at low temperature [Wide application]The LiFePo4 lithium battery is safe, efficient and portable, suitable for camping, RVs, caravans, electric boats, tool trailers, solar panels, children’s vehicles or can be used as a backup power supply. [10-year lifetime]We are committed to providing you with satisfactory-service. We provides 5-Year-after-service for this 12.8V 100Ah Lithium battery with responsive and satisfying customer-service. A proper solution will be provided to any problem within 24hrs for delivery, battery and problem during using and any other questions. Specifications: Upgrade Parts/Accessories: Class A Material: lithium iron phosphate Standard charging current: 20A Max continuous discharge current: 100A Voltage: 12V Maximum Protection Voltage: 14.6V Final Voltage: 10V Clamp: M8 Charging Temperature (℃): 0~45℃/32°F~113°F Discharge Temperature(℃): -20~60℃/-4°F~140°F Storage Temperature(℃): -10~50℃/14°F~122°F Product Dimensions:332*176*220mm Recommend Charger: Charging Voltage: 14.2v – 14.6v Charging Current: <0.5C Weight: 10.5KG Package contents: 1* 12V 100Ah LiFePO4 battery 1* Product Manual 2*200A ring crimp connectionMatters to note when using. 1. Please fully charge the batteries before connecting in series and parallel. 2. Maximum support 4 battery packs in series, more than 4 batteries may be permanently damaged. 3.Prohibit reversing the positive and negative terminals, reversing the terminals may damage the battery. 4.Prohibit charging over the maximum charging current, over this current may cause permanent damage to the battery. 5. Prohibit exceeding the maximum discharge current discharge, exceeding this current may cause permanent damage to the battery. 6. Prohibit exceeding the charging voltage to charge the batteryPaymentReturnDelivery detailsAbout usContact usPaymentWe accept PayPal payment,PayPal Credit,Credit card or debit card and so on. We will leave a positive feedback immediately after payment is received. We appreciate a positive feedback as much as you do. If for some reason there is any issue with the purchase, please contact us prior to leaving feedback, we will be glad to work together and provide a satisfying solution.ReturnAll of our items are backed with a 30-day return policy. We ensure all our items are new and in excellent condition prior to shipping. In case you receive the item that is not to the standards above, please contact us via eBay messages. All returns must be in new original condition as received and should be shipped with delivery confirmationPlease note that all returns must be pre-approved by us. Unauthorized returns will not be accepted. If you need to return, please check twice to confirm the item not work and contact our customer service representative, let us know the detailed problem and send us some.Delivery detailsIf you do not receive the item in the estimated time, or the parcel is broken/missing, please send us a message before you open a case/return, we will try our best to solve it.About usTCBWORTH is a manufacturer and wholesaler of renewable energy products, and we specialise in energy storage batteries. We are committed to providing high quality LiFePO4 batteries with advanced raw materials and superb craftsmanship. We want our customers to use power more conveniently in outdoor, yard, camping, hiking and fishing, making our life more convenient. We advocate green environmental protection and provide users with better products and services. Contact usWe have the most powerful after-sales service to solve all kinds of problems you encountered about the product, help you better use our products, answer your doubts, in order to bring a better experience.