Key Finders Wireless Paging Key Fider; Help find keys ,wallet easily; Set of 1-1,2-1,4-1,6-1 are all available Specifications: (1) Set of 4-1 Remote Paging Keyfinder consists of: a. one main control paging unit with 4 color coded buttons; b. 4 color coded Receivers matching the main unit ( Transmitter) (2) Use one CR2032,3V battery for Receiver;One A27,12V battery for Transmitter commonly can last for 3-6 months; Features: (1) Radio Frequency:433.92MHz( keep stable at this frequency, won’t fluctuate in a large range) (2) Sound Volume: 85-90 dB(penetrate through cushion and walls); (3) Remote Distance:30 meters (4) The Receivers will beep and LED light flash for easy location in dark. (5) Battery Operated, Low Power Consumption, commonly can last for 3-6 months; (6) Automatically power lack caution/reminding: if battery power is not enough, it will beep and remind automatically. Remarks: (1) We have sets of 1-1,1-2,1-4,1-6 key finders. Welcome your kind inquiry. (2) Color and model can be made as customer needs. (3) OEM & ODM are both highly welcomed. Please don’t hesitate to contact us, since you fall in love with this item.