Exit Door Alarm, Finish Unfinished, Cylinder Type Key Lock, Arm Type Key Control, Alarm Type Audible/Annunciation, Inside Keyed Cylinder Type Alike, Siren Style Horn, Activated By Reed Switch/Magnet, Alarm Duration 30 sec, 3 min or Continuously, Door Handing Non-Handed, Body Thickness 2 in, Body Dia. 5 3/8 in, Body Length 5 3/8 in, Body Height 5 3/8 in, Body Width 5 3/8 in, Decibels 105 dB, Power Source 9V Battery, 1 Amps, Housing Material Polycarbonate, For Use With Interior and Exterior Doors