Find your key or any other items easily Locate keys up to 40 meters (120 feet) away, through floors, walls, even sofa cushions How to match: 1. Use a pen or needle to turn on the first keychain, it will beep constantly (“dee.dee.dee.”). 2. Push the button , LED on, and the keychain will stop beeping after matching. 3. Turn on the second keychain, and push button B, keychain will stop beeping after matching. 4. Do the same for the other keychains and buttons. Wear the 5 keychains on the things that you want to find Package Includes: 1 X Remote 5 X Keychain 1X Holder 1 X User manual 1 X 27A battery Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.