With the Sensaphone Remote Monitoring and Control, a synthesized voice will call up to eight phone numbers to contact and advise you of the temperature and status of sensors over the phone. Now you can add a motion sensor to the Sensaphone system that protects your home. The Sensaphone PIR Motion Sensor uses infrared to monitor the movement of warm bodies in a specific area and will direct your Sensaphone to call you immediately if motion is detected. The Sensaphone is sold separately.# Sensaphone PIR Motion Sensor # Instructions