For aluminum, hollow metal and wood doors It allows one motion egress at doors equipped with electromagnetic or electronic locks, with ???no prior knowledge??? required by the user. Touching the Smartbar at any point on the bar activates internal circuitry which controls power to the locking device. No moving parts results in low maintenance and long life. The 692 SmartBar provides two directionally opposed infrared detection circuits to sense an exit request. As a person touches the bar the light beam is broken. The patent pending redundant system provides a high level of life safety and peace of mind to the end user. An audible alarm is standard. This feature provides a security alarm to alert when there is a prolonged unlocked condition caused by a continued break in the light beam. This feature is desirable in applications requiring monitoring of security conditions or delayed egress. Heavy duty aluminum extrusion with cast metal end caps - Maximum durability Fi