Exit Door Alarm Finish Red Cylinder Type Key Lock Alarm Type Horn Siren Style Three Minute Piercing Horn Activated By Unauthorized Egress Alarm Duration 30 sec 3 min or Continuously Door Handing Non-Handed Body Thickness 2 in Body Dia 5 in Decibels 105 dB Power Source 9V Battery Housing Material Polycarbonate For Use With Exit and Entry Doors Includes 9V Battery Door Alarm Mounting Hardware One Warning Label 16200 Reed Switch Assembly Remote Horn