The AlarmAmp is for the Industrial Scientific Tango TX1 and increases the noise alarm.
Industrial Scientific AlarmAmp for the Tango TX1 (Orange)The AlarmAmp for the Tango TX1 increases the monitor’s audible alarm from 100dB to 110dB at 10cm. It can be used by simply clipping the AlarmAmp onto the front of the Tango TX1. This accessory is suitable for loud-noise applications.