The ozone sterilizer is designed with a built-in battery that can power to generate and diffuse ozone quickly. It can capture harmful airborne particles and purify any space in your bedroom, living room, kitchen, toilet or car. Not only that, it also eliminates the odor of indoor smoke, cats, dogs and other pets, and dust products. It has two working modes: cycle and single, so you can set the cleaning capacity to your preference. With a compact doughnut shape design, It’s also convenient to carry to other places so you can breathe in fresher, cleaner air.