Simply plug the Bellman Visit Telephone Transmitter into a telephone jack. When activated by an incoming call, the telephone transmitter sends a radio signal to the Bellman Visit receivers (see related products) for alerting. When not using the telephone cord, the transmitter becomes a multi-purpose transmitter.
By setting the dipswitches, it can be used as a push-button pager to call someone. Use with the Bellman Visit Door Entering Contact Mat (purchase separately) for door monitoring. Use with the Bellman Visit Magnetic Door/Window Switch (purchase separately) for door and window monitoring. Uses one 9V battery (not included.) Dimensions: 2.4 x 3.8 x 1.2. 2-year manufacturer's warranty. Color: White/Red.