refrigerator air purifier 1)Specification: 7.5*8*11.5cm 2)Battery: 3pcs AA size batteries for over 3 months 3)Mark: built-in refrigerator air purifierSpecification: 7.5*8*11.5cmBattery: 3pcs AA size batteries for over 3 monthsMark: built-in micro CPU, which makes the unit intelligently control the operation cycle & mode with one touch and indicate with colored LED. Also ideal for use in lockers, ...