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The Extech by FLIR sound level alert with alarm lets you continuously monitor sound levels throughout the day. Bright LEDs (red flashing or green) alert user when sound level is too high or too low. LEDs can be read from 30m (100 ft.). Wall, desk, or tripod mount with optional 15 ft. (5m) microphone extension cable for remote monitoring. User-programmable high or low limit (30dB to 130dB) with output to drive external relay module. Ideal for industrial, hospital, auditoriums, schools, and other areas where there is a need for notification when sound level reach set points. Sound Level Monitor/Alarm, 30 To 130 dB