The ES440 series consists of button control devices for use in access control applications such as emergency exits, lock release, and request to exit. These easy to operate Request To- Exit controls are ideal for use in corporate, industrial, institutional or commercial settings. Designed Security, Inc. push buttons are designed to control electric locks and strikes, magnetic locks, automatic pedestrian & overhead doors. They may also be used for shunting, bypassing alarms, request to exit, timed functions and many other applications. Our push buttons are versatile and can be supplied in various text and languages to suit any corporate, industrial, institutional or commercial application. Various contact configurations and time delay relays are available.