When you want to find the lost keys or other things￡? just press the matching button on the remote control key and the ceychain will sound alarm within 0.5 ~ 2 seconds (according to the distance)￡? alarm will last for 4 seconds and then stop. In addition￡? turn up the key chain&acute;s swicth to "ON" opsiton￡? it will beep conctantly￡? and push one button on the remote control key￡? key chain&acute;s will stop beep after macthing.                                    Features            The receiver is very light￡? small and colorful￡? very easy to secure the keys or other things￡? battery: 1 x CR2032<br>The transmitter is designed as a remote control key￡? actually it is￡? easy to carry and operate￡? battery: 1 x CR1632<br>                                                                                                Package Includes            1 x 1 Channel Super RF Wireless Electronic Key Finder<br>1 x The transmitter<br>