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 jets..SpecificationsSolar PanelPower: 300WWaterproof rating: IP65Conversion rate: 19.6-20%Colour:blackMaterial:Monocrystalline siliconSize:540 x 280 x 2.5mmPackage Contents:1 * 300W Solar panel1 * 100A Controller2 * Alligator clip1 * Car charger4 * Suction cups2 * Buckle