Features:
Remote controller(transmitter): stick it on the wall, press buttons to find keys
Keychain(receiver): beeps to find the lost things, wear it with the thing you want to find
Red LED indicator light
Buttons: 3 buttons to find 3 different things

Match: use a pen or needle to turn on the first keychain, it will beep constantly, push the button "A", LED on, and the keychain will stop beeping after matching. Make sure the LED is off. Then, turn on the second keychain, and push button B, the keychain will stop beeping after matching. LED will be off in 4 seconds, then, do the same for the third keychain. Wear 3 keychains on the things you want to find.
Find: when you want to find the lost things, just press the corresponding button, and the keychain will sound alarm, you can find the lost thing by the alarm, the alarm will last for 4 seconds, and then stop automatically.
Power: Receiver: 1 x CR2032 Button Cell Battery(included)
          Transmitter: 1 x 12V/27A Battery(included)
Size: Receiver: 4.5 x 2.8 x 1.1cm
       Transmitter: 12 x 4.4 x 1.7cm

Package included:
1 x Transmitter
3 x Receiver
1 x Manual