Small size, easy to carry; Remove smell / sterilization / fresh air / mobile power bank function; Sterilization: O3, can be used to break down a variety of odor and smell, with the killing rate of more than 95%; Negative ion function: improve your sleep / strengthen resistance to diseases / easy to absorb bacteria, change the structure of bacteria and energy transfer, causing bacteria lesions of death; Mobile power function, good charging treasure for you.