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