SF100 RSST is a conventional wall mount sounder and strobe, designed for installing in conventional fire alarm systems. Supports 32 different tone types and two sound levels, controled by jumpers. SF100 RRST is equipped with two additional separate inputs for Alarm and Evacuation events. The tone sounds of the inputs are different for easy recognition from the users on the protected site. The Evacuation event is with the highest priority. Certified according to standard EN54, part 3.