Used to charge cell phones, MP3s, tablets or other USB charging devices. You can put the panel in the sun and charge the device immediately. Very suitable for outdoor cycling, mountaineering, hiking, camping, traveling, etc. 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. Plug and Play: Built USB port in the solar panel, come with charring cable, fit most kinds of device, plug and play, avoided out unexpected off power. Waterproof: Advanced water and dust proof level, complete protection against environmental particles and low pressure water .. Specifications Solar Panel Power: 20W Waterproof rating: IP65 Conversion rate: 19.6-20% Colour:black Material:Monocrystalline silicon Size:540 x 280 x 2.5mm Package Contents: 1 * 20W Solar panel 1 * 100A Controller 2 * Alligator clip 1 * Car charger 4 * Suction cups 2 * Buckle Only the above package content, other products are not included. Note: Light reflection 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.