Spec Sheet Preview: The IR019, IR019B and IR019C remote tone speakers provide for remote tone annunciator when connected directly in parallel with an Alpha Communications® / TekTone CM800 or DS100 series annunciator and PK2019A control unit. The IR019 and IR019B tone speakers feature a momentary contact tone-off button for tone silencing. Depressing the tone-off button silences the tone at all sounding locations. When the emergency initiating device has been reset, the tone-off will automatically reset. The IR019B also includes a tone-off light wh …