It has three gears, refrigerator deodorizer can be adjusted according to the need to deodorant , to ensure that the environment is fresh and odourless, deodorant only 10min, freshness extended by 7day, to ensure environmental hygiene and cleanliness. Usb charging: The closet deodoriser can be charged via usb, which is both convenient and environmentally friendly. Simply connect it to the usb power supply to charge, no need for batteries, reducing waste. Advanced deodorisation technology: The fridge deodorizer releases active oxygen ions to increase the overall space circulation circulation and improve the degradation rate of pesticide residues, which can effectively eliminate unpleasant odours. The deodoriser has a built-in uv lamp with an inactivation rate of 99.99%. Portable and versatile: The closet deodorizer's compact size (5.8x2 inches) makes it very portable. Whether you need to eliminate odours from your fridge, car, wardrobe, cabinet or other confined spaces, this deodorizer will meet your every need. Easy to use: The fridge deodoriser odor eliminators features a freeze-proof design, -20°c can be normal. It features one-button control, allowing you to easily turn it on/off and adjust the deodorant intensities. The compact design also makes it easy to place it wherever you need it.