Extech SL130G Sound Level Alert with AlarmExtech SL130G Sound Level Alert with Alarm Sound Level Alert with Alarm Built in LEDs alert user when sound level is too high or too low LEDs can be read from 30m (100ft) Key Features: Ideal for industrial, hospital, auditoriums, schools and other areas where there is a need for being alerted when sound level reaches set point Meets ANSI Type 2 and EN 60651 accuracy specs compliant to OSHA User settable high or low limit (30 to 130dB) indication with