... heat and smoke detector 1. Suit for detect the heat in house, hotel, etc 2. 4 wire heat detector mini 4-wired combined heat and smoke ... visibility6. Relay output 7. Suitable for detecting the heat in house, shop,hotel, restaurant,office, building, ... ItemDescribeOperating voltageDC9~35V Static current50uA Alarm current23mA(DC 12V)/25mA(DC 24V)Alarm outputRelay OutputContact rating0.5A@DC28VTemperature ...