Outdoor solar panels can effectively convert sunlight into electrical energy. Clean energy, long service life and energy saving. Keeping the air clean helps to eliminate the smell of pets, tobacco, etc. Maintain a comfortable temperature level during the journey. Suitable for greenhouse, , and RV etc. Precautions 1. Please do not scratch the surface of the solar panel with sharp objects. 2. When charging the charger with solar energy, please place the solar panel facing up in direct sunlight to the best charging effect. 3. Please do not put the charger in outdoor solar energy for emergency charging in , so as not to cause short circuit. (The front of the solar panel is not afraid of rain (note that no water enters the USB and DC ports.) Power: 20W Material: monocrystalline silicon Color:black Package Contents: 1 x Exhaust Fan 1 x Solar Panel 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.