The Alarm Lock PG30MS is a keypad-operated, surface-mounted, microprocessor-controlled door alarm that provides degrees of access to suit various applications such as unattended fire stairways, airport security area, and delivery entrances. Self-contained and dual-tamper supervised. Sleek model design key-activated door alarm for use on standard size and narrow stile doors. Unauthorized use of door activates LED indicator and causes alarm to sound; Alarm has 3 programmable 95db siren styles: sweep, pulsed, and steady. Options include continuous alarm, 2 minute shutdown with auto reset and exit/entry delay. Digital codes for master, management and passage (used for auto-arming).