Exit Door Alarm Kit Finish Aluminum Cylinder Type Mortise Alarm Type Horn Inside Keyed Cylinder Type Mortise Siren Style Horn Activated By Unauthorized Egress Alarm Duration Variable Door Handing Non-Handed Body Thickness 1/8 in Body Length 12 in Body Width 1 3/4 in Decibels 85 dB Power Source 9V Battery 0.3 Amps Housing Material Aluminum For Use With 99 Series Exit Devices Includes 9V Battery