SOUND LEVEL METER The Extech Sound Level Meter utilizes a 0.5" condenser microphone at a 40 to 130dB meauring range. The meter records max/min values over time. Applications include monitoring workplace machinery, installing audio and alarm systems, and product noise certification and reduction. Specifications:  Display counts: 2000 count LCD Range: 40 to 130dB Resolution: 0.1dB Basic accuracy: +/-2dB Condenser microphone: 0.5" (12.7mm) Analog output: AC Dimensions: 9 x 2.2 x 1.7"(230 x 57 x 44mm) Weight: 5.6 oz (160g)