Outdoor panels can effectively convert daytime into electric energy. Clean energy, lengthy service life and effort saving. Keeping the air clean supports to the odor of pets, tobacco, etc. Maintain a cushty temperature point in the course of the journey. Suitable for greenhouse, , and RV etc. Precautions 1. Please do not scratch the of the panel with objects. 2. When charging the charger with energy, please position the panel facing up in direct sunlight hours to the finest charging effect. 3. Please don't put the charger in exterior energy for emergency charging in , so that you could no longer trigger short circuit. (The entrance of the panel is not petrified of rain (note that no water enters the USB and DC ports.) Power: 20W Fan size: 6x6 in (.) Material:ABS monocrystalline silicon colour:black Package Contents: 1 x Exhaust Fan 1 x Panel Only the above kit content, different products aren't included. Note: Light and assorted exhibits could cause the color of the item within the photograph just a little diverse from the real thing. The size allowed error is +/- 1-3cm.