Emergency Alarm Switch, Type Key-To-Reset, Switch Action Door Release, Material Zinc, Finish Painted, Depth 1 25/32 in, Height 5 1/4 in, Width 3 59/64 in, Color Blue, Rating 10A, Input Voltage 28V DC, Operating Temp. 0 Degrees to 40 Degrees C, Event Audit Trail No, Keypad No, Standards CE, For Use With Emergency Systems, Includes 2.5mm Hex Key, Spare Glass