Outdoor photo voltaic panels can effectively convert daytime into electrical energy. Clean energy, long carrier existence and effort saving. Keeping the air clear supports to get rid of the smell of pets, tobacco, etc. Maintain a snug temperature point in the course of the journey. Suitable for greenhouse, puppy house, tree residence and RV etc. Precautions 1. Please do not scratch the outside of the photo voltaic panel with sharp objects. 2. When charging the charger with photo voltaic energy, please place the photo voltaic panel handling up in direct daylight to ensure the best charging effect. 3. Please don't put the charger in outdoor solar energy for emergency charging in wet days, so as to not cause brief circuit. (The entrance of the photo voltaic panel isn't fearful 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 package content, other merchandise are usually not included. Note: Light capturing and sundry displays could cause the colour of the article within the photo a bit of assorted from the real thing. The size allowed error is +/- 1-3cm.