... Transmitter 3.CE&ROHS 4.Match 3 receive remote controller key finderABS plastic high-tech novelty finders for ... to ON position,it will beep constantly("dee...dee..."),and push the button"A",LED on,keychain will ... LED off,Then turn on the 2nd keychain,and push button"B",keychain will stop beep after ... keys,just push the corresponding button on the card,and the keychain will sound alarm within 1 second, ...