Andoer Portable Source, 21W Foldable Sun with Dual Ports, Survival Tool for Camping and Hiking

: 21W sun power panel with more than 18.5% conversion efficiency and output peak current is 3500mAh totally for dual port. : Built-in intelligence chip can identify different device and change input current according to your device. : For almost devices like phone, tablet and so on devices with port. : polymer surface and outer wrap can solar panel unexpected rainy or fog, just do not put it in water. : it on your backpack and make full use of sun power energy to charge during trips, and folded it to fit in your backpack for convenient carry.