The HUS-7A is a single button, latching hold-up switch designed to provide a rapid signal to alarm systems. It is activated by pressing down the single button switch.
A status window indicates the condition of the switch: RED (alarmed), BLUE (armed). A U-shaped key is supplied to reset the HUS-7A. The hold-up switch sends a signal to a dedicated 24 hour hold-up circuit of a burglar control panel.