Compro chiasso 100 sounder compro ch100dr the compro ch100dr is a red chiasso industrial warning sounder that has been designed with a high sound output this chiasso sounder can produce 39 tones that are user selectable a second tone for 2 stage alarms can also be selected the sounder is ideal for places where the sound level must not exceed 120db the housing has been manufactured from fire retardant abs plasticapplications fire security industrial railway marine optical and ac