Specifications Operating Voltage Range: 9-28VDC Volts Alarm Current: 5 mA @ 24 VDC Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing Operating Temperature Range: -10°C to 50°C (14°F to 122°F) Dimensions: 140mm L x 105mm W x 45mm H Description The addressable manual call point designed for addressable fire alarm system for reporting fire or emergency condition by its PUSH IN/PULL DOWN handle latches. So the addressable manual call point is only used with addressable fire alarm control panel, it is forbidden to be used to other system.