Exit Door Alarm, Finish Metallic Bronze, Cylinder Type Mortise, Arm Type Keyless Control, Alarm Type Horn, Inside Keyed Cylinder Type Rim, Siren Style Horn, Activated By Unauthorized Egress, Alarm Duration 30 sec, 3 min or Continuously, Coverage 10 ft, Door Handing Non-Handed, Body Thickness 2 in, Body Dia. 2 1/2 in, Body Length 2 3/8 in, Body Height 11 in, Body Width 2 1/2 in, Decibels 96 dB, Power Source 9V Battery, Housing Material ABS Plastic, For Door Thickness 1-3/4 in