315Mhz Wireless car key fob with key chain (battery included)

This is a Wireless car key FOB with 4 buttons: Lock,unlock,mute and alarm on. A blue led will light on when any button were pressed. Use this FOB to communicate with Codec-Adaptive Wireless Relay for your remote control project. The communication distance can arrive at 20m.DocumentsPlease visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum.