The Bellman Visit Door Transmitter is the part of the Bellman Visit system helping you to notice doorbell calls. The installation is extremely simple, simply attach the Door Transmitter near the doorbell or intercom telephone. It is activated by both mechanical/electrical doorbells and intercom telephones. When activated, the Door Transmitter sends a radio signal to the Bellman Visit Receiver(s) for clear alerting! Powered by one 9 volt battery; battery life is between approximately 3 and 10 years depending on battery type (alkaline or lithium).
