Outdoor photo voltaic panels can efficiently convert sunlight into electric energy. Clean energy, prolonged service lifestyles and effort saving. Keeping the air clear supports to get rid of the odor of pets, tobacco, etc. Maintain a cushty temperature point during the journey. Suitable for greenhouse, pet house, tree residence and RV etc. Precautions 1. Please do not scratch the outside of the solar panel with sharp objects. 2. When charging the charger with photo voltaic energy, please position the solar panel handling up in direct daytime to ensure the best charging effect. 3. Please do not put the charger in outdoors solar energy for emergency charging in wet days, so as to not set off short circuit. (The front of the photo voltaic panel is never afraid of rain (note that no water enters the USB and DC ports.) Power: 20W Fan size: 6x6 in (approx.) Material:ABS monocrystalline silicon colour:black Package Contents: 1 x Exhaust Fan 1 x Solar Panel Only the above equipment content, diversified merchandise aren't included. Note: Light capturing and varied reveals could cause the colour of the item within the photograph slightly varied from the genuine thing. The size allowed error is +/- 1-3cm.