Fire Alarm Transmitter W/Out Battery

This Silent Call Transmitter wires into your fire alarm system to ensure that all members of your family or residents of a building know when there is a fire. for use in homes or facilities where a fire alarm system is present should be installed by a licensed fire alarm company battery powered unit is activated by contact closure electrically powered unit is activated by input voltage (12 or 24 VDC) signals any Silent Call receiver select battery or electrically powered model above