... hours 3.5g new blue ozone plate for air purifier used for household1.used in household air purifier, ,dryer,shoe cabinet, oxygen bar and so ... than 3000 hours 1.Usage:Used in household air purifier,air fresher, home air purifier,Dryer,dishwasher,shoe cabinet, household disinfectant cabinet, oxygen bar, dehumidifier, refrigerator, domestic ...