Photoelectricity conversion: light is electricity. It can be in the sun or on cloudy days. High-efficiency PET solar panels solve the problem of power supply. 0 electricity bill, no need to draw electricity, environmentally friendly. odors in pet houses. Solar exhaust fans solve odors in pet houses. Provide for pets. No wiring required, plug and play. IP65 waterproof protection., Weight: 2.19139488428 Pounds, Manufacturer: ximie