1.Used to charge cell phones, MP3s, tablets or other USB charging devices. 2.You can put the panel in the and charge the device immediately. 3.Very suitable for outdoor cycling, mountaineering, hiking, camping, traveling, etc. 4.Portable Design: Small in size and light to take, it is easy to carry for camping or other outdoor activities. Easy to install with pre-drilled holes on the back of panels for fast mounting and securing. 5.Plug and Play: Built USB port in the solar panel, come with charing cable, fit most kinds of device, plug and play, avoide out unexpected off . Waterproof: Advanced water and dust proof level, complete protection against environmental particles and low pressure water jets. Solar Panel: Material: monocrystalline silicon Solar panel voltage: DC12V Solar panel : 300W Transformations efficiency: 20% Proof rate: IP65 Item weight: 600g Open circuit voltage (VOC): 5V Short circuit current (Isc): 3A Output: USB Number of USB ports: 2 Solar Controller: Voltage: 5V Maximum supply voltage: 6V Short circuit current: 2A Working temperature: -40+85 Colour: Blue Material: Monocrystalline silicon Size: 43 x 20cm Package Contents: 1 x solar panel 1 x 100A controller 1 x One towing ten charging cable 1 x charging cable 1 pair x alligator clips 4 x suction cups Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.