2578: 'AH' and 'AS' Series of notification appliances
activation when used with Siemens synchronization – The Series ‘AS’ Horn | Strobe and Series ‘AH’ Horn appliances incorporate a Patented Universal Mounting Plate that allow mounting to a single -gang, double-gang, 4-inch (10.2 cm.) square, Siemens SHBBS-Series surface backbox –