The AlertMe Keyfob, from AlertMe, is a ZigBee Key Fob. Presence Detector & Security Arm / Disarm
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The AlertMe Keyfob can be used in a similar way to a TV Remote control, but to control different aspects of your smart home, rather than just changing channels!
The Control System can be configured to react to the button presses to turn on lights, fan heaters, or even enable / disable the status of your home security.