Solar Exhaust Fan: The fan use solar panels as a power source, and is equipped with a standard USB regulator to maintain 5~6V output. It can be used conveniently and quickly outdoors anytime and anywhere. High Conversion Efficiency: The efficiency of monocrystalline solar cells is as high as 20%. Outdoor solar panels can effectively convert sunlight into electricity. If the light is insufficient or cloudy, the effect will be affected. Super IP65 Waterproof: The solar panel is laminated on the epoxy resin , and the IP65 waterproof can adapt to the harsh outdoor environment and improve durability. No afraid of wind and rain. Maintain Air Circulation: This portable exhaust fan can effectively help you maintain indoor air circulation. Keeping the air clean can help you eliminate the odor of pets, tobacco, etc. Wide Range of Applications: Suitable for kitchens, greenhouses, pet houses, chicken coops, tree houses, etc., to maintain a comfortable temperature level. Colour: black Material: monocrystalline silicon Size: 220x190x3mm Package Contents: 1 * Solar panel 1 * Exhaust fan 2 * Mountain climbing buckle 4 * Suction cup 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.