SpecificationsRFID Electronic Keyfinder Small Controler, Small key seeker. Long distance, OEM service provide, custom logo Function:Match:Turn up the keychain's switch to “ON” position, it will beep constantly (“dee...dee...”), and push one button on the remote control key, keychain's will stop beep after matching.Find: When you want to find the lost keys or other things, just press the matching ...