... Limited is one of the professional ultrasonic aroma diffuser for home appliance manufacturers and suppliers,Website:http://www.soicarearomadiffuser.com, ... continuous operationAuto power-off when no waterFit place:Bedroom, study , office, living room, bathroom , yoga room , SPA shop, fitness room , ... life6.Effectively kill bacteria, purify the air, is essential for office and home healthcare guards.