1.It is able to sterilization addition to mold, clean air, with a refreshing. 2.Durable use. ... only two big batteries.2.It is able to sterilization addition to mold, clean air, with a refreshing, soothe the nerves ... , nightclubs, office buildings, sauna city, business room, beauty salon, coffee, tea, restaurant, office, reception room and family room, bathrooms and other public places.The ...