2-wire DC24V Conventional Manual Call Point Broken Glass Button Push Button The conventional manual call point designed for conventional fire alarm system for reporting fire or emergency condition by pull down the plate. The manual call point can be reset by a special key without breaking the glass. Features 1. Compatible with all the conventional fire alarm control panel 2. Can be reset by key without use a new glass 3. 470 Ohm resistance 4. Easy surface mounting Base included Specifications Operating Voltage Range: 9 to 28VDC Volts Alarm Resistance 470ohm/1W Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing Operating Temperature Range: -10C to 50C (14F to 122F) Dimensions: Length 140mm, Width 105mm, Depth 45mm Weight: Net Weight 220g