SOUND LEVEL METER The Extech Digital Sound Level Meter serves general purpose and high accuracy type 2 measurements. High and low measuring ranges are from low: 35 to 90dB and high: 75 to 130dB. The meter can also hold the max reading and includes a reset button. If the data seems to be questionable, it includes a built-in calibration check (94dB) when using one of the optional sound calibrators. The meter also has outputs for AC/DC that is used when connected to an analyzer or recorder. Specifications:  Low range: 35 to 90dB High range: 75 to 130dB Basic accuracy: +/-1.5dB (Type 2) Weighting (A&C): Yes Response time (fast/slow): Yes Condenser microphone: 0.5" (12.7mm) Analog output: AC/DC Dimensions: 9.5"x2.7"x1" (241x69x25mm) Weight: 7.6oz (215g) CE: Yes Warranty: 1 year