It is connected to a device to activate the siren and alarm output in an emergency. Installed on exiting side of door in case of emergency to override the access control, if the door does not open in an emergency. Use the attached hammer to break the glass to open the door.
Dimension : 86W x 86H x 50H (mm)
Weight : 150gr
Color : Green, White
Material : ABS
Mechanical Life : 500,000 tested