How to use: ★ Match: 1. Turn up the keychain's switch to 'ON' position, it will beep constantly ("dee…dee…"). 2. Push the button "A" , LED on and the keychain will stop beeping after matching. 3. The LED on the remote controller will last for 4 seconds,make sure it is off, and after that , turn on the second keychain. 4. Push the button "B", the keychain will stop beeping after matching, LED will be off after the second matching. 5. Do the same for the other 3 keychains and buttons,wear the 5 keychain on the thing you want to find. ★ Find: 1. When you want to find the lost things, just push the corresponding button, and the keychain will sound alarm, 2. you can find the lost thing by the alarm, alarm will last for 6 seconds every time,and then stop automatically 3. Please match the receiver one by one, avoiding that one button match several receivers. Specifications: 1. Material: plastic 2. Output : DC 4.2V-650mAh 3. Sound Volume of Receiver: 70-80dB 4. Effective range(MAX): 25m (indoor) 40m (outdoor) 5. Receiver Battery(included): 1x CR2032 6. Transmitter Battery(included):1x CR2016 7. Net weight:about 280g Package includes: 1 x Remote control (transmitter) 5 x Key receivers (receivers) 1 x User manual 1 x Base support Our products have been well tested, examined and packaged before sending off. You can rest assured that your purchase at our store is guaranteed. Any problem please feel free to contact us first so that we can supply the best service for you.