... hours 3.5g new blue ozone plate for air purifier used for household1.used in household air purifier, ,dryer,shoe cabinet, oxygen bar and ... Approved3.Life: more than 3000 hours 1.Usage:Used in household air purifier,air fresher, home air purifier,Dryer,dishwasher,shoe cabinet, household disinfectant ... of using earth:This kind of ozone generator can be used in air and its life time can be up to 3000 ...