Exit Door Alarm Finish Powder Coated Cylinder Type Mortise Arm Type No Arm Alarm Type Horn Inside Keyed Cylinder Type Mortise Siren Style Horn Activated By Unauthorized Egress Alarm Duration 2 min Coverage 6 ft Door Handing Non-Handed Body Thickness 2 in Body Length 2 5/8 in Body Height 8 3/8 in Body Width 2 5/8 in Decibels 90 dB Power Source 9V Battery 0.3 Amps Housing Material Alloy For Door Thickness 1-3/4 in Standards ANSI 156.3 For Use With Emergency Exit Doors