Key Finder Classification:Wireless Keyfinder;Anti-lost Finder;Key Finder Specifications: (1)Wireless sets of Keyfinder:1 Main Paging Transmitter with 6 Receivers; (2)Remote Controll Distance:30~60 meters(in open area); (3)Battery Operated: use one CR2032,3V Battery for Receiver; use one A27,12V Battery for Transmitter; (4)Size:6.0*3.3*0.7cm; (5)Frenquency:433.92MHz( stable); (6)Receiver beeps and LED light flashes upon pressing the buttons on Transmitter. Features: (1)Wireless and Battery Operated,Low Power Consumption,lasts for 3 months around; (2)Super thin design:with a size of 6.0*3.3*0.7cm; (3)Using Stable Frenquency Technology: keep at the stable frequency of 433.92MHz; (4)Mulit Colors for options:Green,Blue,Yellow,White,Purple,Red.Customer's requested color is also available. (5)Automatically caution/reminding while low battery power Remarks: (1)Logo printing is available; (2)OEM & ODM are both highly appreciated.