LOCATE LOST KEYS in seconds! Just place your keys on these color-coded keychains. If you should misplace your keys, press the color pager button on the wireless transmitter to find keys up to 50 ft. away. The missing keychain will beep so you can easily find it! You get 2 color-coded keychains plus transmitter. Transmitter uses 2 AAA batteries (not incl.); keychains include cell batteries.