Additional transmitter and magnet to help monitor doors. Alarm or chime sounds when transmitter and magnet are separated. Uses a 6 volt alkaline battery (installed) and has 32 frequency codes to help reduce interference.
There are thirteen selectable sounds (with the push of a button) on each transmitter.
To purchase the transmitter and receiver together, see the STI-3360 Entry Alert® Chime.
Note: End user must verify the alarm and battery every six months and replace battery annually or as required.