... 3.UV-light,photocatalytic sterilization 1. negative ion car air cleaner2.4.Eliminate indoor static,kill mites easily3.no consumable ... ,kill mites easily;5.no consumable;6.Heathy anions,fresh air; Suitable places:Next to car and computer,study room,small ... once in 1-3 months ,according to the use environmental conditions . A).Cut off power supplyB). Unscrew the bottom cap according ...