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The Von Duprin ALK Alarm Kit converts the Von Duprin 22, 33A, 35A, 98 and 99 Devices to an alarmed exit device.   When you exit the 85 decibel alarm will sound.  Powered by a standard 9 volt battery and is controlled by a Mortise Cylinder with a straight cam.  When battery is low, the alarm will beep.  

Mortise Cylinder NOT included.

Von Duprin Part # 22-ALK, 33A-ALK, 35A-ALK, 98-ALK AND 99-ALK