The HHSLF is a high quality, low profile, low frequency audible and visible appliance that offers a dependable audible and visual alarm. The HHSLF is ideal for any occupancy that requires notification appliances. The HHSLF horn offers a 520 Hz square wave, temporal 3 tone. A jumper selection is available for normal or loud decibel tone. A temporal 4 pattern is available when used with the Hochiki Synchronization Control Module. The HHSLF is available in a fixed 15, 110 and 177 candela strobe.