... Receiver)--Beeps to find the lost things,wear it with the thing you want to find. LED--It ... position,it will beep constantly("dee...dee..."),and push the button"A",LED on,keychain will stop beep after ... LED off,Then turn on the 2nd keychain,and push button"B",keychain will stop beep after match,LED ... want to find the lost keys,just push the corresponding button on the card,and the keychain will sound ...