1Ozone + Ultraviolet twoinone function: there are 400 ozone vents on both sides, 360 degree large wide angle diffusion, no dead angles. The effective area can be up to 7m. 2Solve daily strong cleaning, suitable for shoe cabinet, refrigerator, bathroom, cabinet, etc. 3Large suction cup setting, arbitrary installation does not take up space. 4Builtin 2000 MAH largecapacity battery, ultralong battery life, easy charging and time saving. 5There are 4 different colors available, you can choose by your needs.