1. Output voltage: DC 5 V2. Output current: 5.0 V / 1000 mAh ~ 2000 mAh3. Input voltage / current: 5.0 V / 1000 mAh4. Battery capacity: 3.7 V / 20000 mAh5. solar panels: 5.5V 300mA 1.5W6. Solar chatting rate: 10 ~ 11%7. Product size :( L) 17 * (w) 78 * (h) 160 mm8. Weight: 360 g9. It can charge in the sun or computer or alternating current.(Solar function designed specifically for emergencies, This is not the main source of charging thanks to the compact solar panel size It charges slowly and ensures that PowerBank has some power before you charge it with the SOLAR company .Overall use, we recommend charging the solar bank cable to Reduce charging time.)Features:1. High capacity Solar Power Battery Charger with 20000 mAh charged for Iphone, for Samsung, Tablet PC and USB devices.2. Built-in 8000 mAh high quality polymer rechargeable lithium-ion battery3. The battery indicator display is the exact percentage of the power.4. Dual USB DC 5V / 1A output charge for mobile phones, DC 5V / 2A output charge for tablet5. Very high conversion efficiency (> 75%)6. Full battery charging time (AC): 7-8 hours.7. ABS + PC body design to provide anti-scratch, anti-fingerprint and durability. Color at will of the customer.Security:1. currentWhen the current increase in the exception, Power Bank immediately start the buffer voltage fuction, provides a steady-state voltage at any time. Avoid charging the device or damage.2. Short circuit protectionWhen there is a short circuit occur in the external device, Power Bank start the protection function, Shut down the power supply and avoid damage from short circuit.3. Overheating protectionWhen Power Bank runs long in high temperatures (exceeding 60 degrees), Power Bank will not be dangerous due to high temperatures.4. over-discharge protectionWhen the Power Bank discharge reached a critical point, the circuit automatically starts the protection function and stops the discharge.5. Overload protectionLong time charge for mobile power or use Power Bank charging for your phone. When the saturation point is reached, the system automatically turns off, avoiding overloading the problem.6. Overvoltage protectionLong time charge for mobile power or use Power Bank charging for the phone, when reaching the saturation point, In order to prevent over voltage, the system automatically shuts down.