Abstract: An alerting system for alerting a user having a transmitter monitoring a predetermined condition (i.e. sound, telephone, door/window access, fire, carbon monoxide, emergency weather alerts, etc.) and outputting an alarm signal in response to detection of the predetermined condition. The transmitter further outputs a supervisory signal indicative of operation of the transmitter (i.e. low battery condition, out of range, etc.). The alerting system further includes an alerting device receiving the alarm signal and the supervisory signal from the transmitter and detecting cessation of the supervisory signal device and outputting a first alert signal to the user indicative of the cessation of the supervisory signal. The alerting device further detecting presence of the alarm signal and outputting a second alert signal to the user indicative of presence of the predetermined condition.