Certification UL listed. Designed to meet ANSI 156.5-1984 and A117.1-1980 for Accessibility Standards. Features Model 330 – Auto relatching Red LED indicator flashes when violation occurs. Light continues to flash beyond alarm cycle and can only be turned off by the inside key. One chasis will accept all available trim options. Unit must be activated to test available battery power. Low battery alert feature causes unit to chirp intermittently to indicate low battery power. Chassis: Paddle, chassis and cover made from a non-ferrous alloy. Cover 12-3/4″ (323.85 mm) x 2″ (50.8 mm) x 2-5/8″ (66.67 mm); paddle projection 3-1/4″ (88.25 mm); length to end of paddle 10-3/8″ (263.52 mm). Power/Electronics: 9 volt battery powered. Modern solid state electronics. Latch: 3/4″ (19.05 mm) latchbolt monitored by an electronic sensor switch. Any unauthorized movement of the latchbolt will cause unit to go into alarm. Doors: For outward swinging doors 1-3/4″ (44.45 mm) thick with a 4″ minimum stile. Alarm/Horn: Alarm sounds for 2 minutes, shuts off and automatically rearms itself. Piercing, dual frequency pulsating horns. Rated for 90 decibels at 6 feet. Cylinders: Inside cylinder operation to arm or disarm unit using 1-1/8″ (28.57 mm) mortise cylinder. (Order cylinder separately).