Universal Security Instruments Relay Module for Smoke and Fire Alarms, Model USI-960

Universal Security Instruments Relay Module for Smoke and Fire Alarms, Model USI-960 Controls external devices such as lights, sirens, bells, electric doors, exit signs and more Auxiliary devices require continuous power Contacts deactivate shortly after alarm stops sounding Compact size of 3.5-inches with mounts in the junction box Comes with a one-year limited warranty