The ES300 Series battery-powered door prop alarm by Designed Security Inc. is a low-cost solution for low-risk emergency exit only doors, such as doors leading to stockrooms from sales floor, stairwell doors, and various internal doors at healthcare and educational facilities. Featuring field-selectable door open times from 1 sec. to 2 min., the ES300 helps prevent secure doors from being propped open to avoid a security breach in the access control system. Built in Texas, the battery-powered ES300 also can be used as a door annunciator by changing the field adjustable timer to 0 sec.
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