Exit Door Alarm Kit, Finish Aluminum, Cylinder Type Mortise, Alarm Type Horn, Siren Style Constant, Activated By Unauthorized Egress, Door Handing Non-Handed, Decibels 85 dB, Power Source 9V Battery, For Use With Von Duprin(TM) 22 Series Exit Device, Includes 6 in x 20 in Decal, 9V Battery