This presense detector using PIR (passive infrared receiver) detects the presence of a person in a room. The units send information to a controller or any other associated Z-Wave device. Up to 4 devices can be controlled from this device. The sensor is a battery-powered device, which is in sleeping mode unless an action is detected. After a programmable sleeping time the device wakes up and sends a status information. After this the unit goes back to sleeping mode. Batteries can be changed without unscrewing the device from the door or frame. The unit will give a visual warning on the device and sends a warning to the Z-Wave controller, when batteries need to be replaced. The unit offers a tampering control and sends an alarm message when tampered.