The Detex EAX-411SK was originally designed to prevent secure doors from being propped open, helping to avoid a security breach in the access control system.  Detex also manufactures exit alarms, such as the EAX-500, EAX-2500 and EAX-3500 that sound when someone exits though a controlled opening, thus helping to control foot traffic.  However, in some applications, staff simply wants a local alarm to alert those nearby that a door was opened.  Rather than create a situation where a supervisor is forced to come to the door with a key and reset an alarm, it is possible that they simply want an alert when a particular door was opened.  In such cases, the Detex EAX-411SK Door Prop Alarm can be used as a door annunciator, by simply changing the field adjustable timer to zero seconds.  When used as a door annunciator, the 90 decibel alarm will sound while the door is open and stop sounding when the door closes.  Typical uses include, low risk emergency exit only doors, doors leading to stockroom from sales floor, stairwell doors, and various internal doors within healthcare and educational facilities.  Remember the Detex EAX-411SK when you are asked about a door prop alarm or door annunciator alarm.  Detex manufacturers one product that will satisfy either customer.