This unit is an extremely sophisticated device that will monitor a room and actually call you when it senses activity. When activity is sensed it will call a number pre-programmed by you and alert you as to the goings on in the room. It will also allow you to continuously listen to the room in question. It offers three sensitivity levels to avoid accidental activation. The only power required for the unit comes from the phone jack.
This device is only to be used in a legal and lawful manner in compliance with all applicable laws and FCC regulations.