Built with 5 foldable high efficiency solar panel, bring more power and stable solar charging experience. Used to charge mobile phones, MP3, PAD or other USB charging devices. Dual USB output ports, convenient to charge the device through the USB charging cable. You can put the battery board in the sun to directly charge your device. It is very suitable for outdoor biking, mountain climbing, hiking, camping, traveling, etc. Specification: Power Max: 70W Output: USB Open circuit voltage (VOC): 5V Short circuit current (Isc): 2A Output voltage: 5V, 2A/18V, 2.21A charging Temperature:-20-70 Celsius Conversion rate: 23-24% Waterproof rating: IP65 Number of USB ports: double Colour:Black Material:Polycrystal + cloth Size:Expanded size: 650x170mm Package Contents: 1 * 70W foldable solar panel