BRK® Smart Relay, 120 VAC, 0.02 A, 15 A at 120 VAC/30 VDC Contact, 40 to 100 deg F, 10% to 90% Humidity, For Use With: BRK Smoke and Heat Alarms and Smart interconnect Break CO Alarm, Specifications: 60 Hz, Specifications Met: CSA 6.19, UL 217, 2034, 539, ULC S-531, ULCS-530, Black Oxide, 3-1/2 in L x 1-1/2 in H