The Ø 125 mm electronic multi-tone alarm sounder features a swivelling loudspeaker with a maximum sound pressure of 118 dB (A) and an IP 66 protection rating. Users can select one of 15 tones via a DIP switch (Type D) or switch all tones externally (Type K). Tone and timing frequencies are adjustable using a potentiometer, all housed in a robust die-cast aluminum casing with an epoxy powder coating.