• 30-130 db in 3 ranges
• 0.1 db resolution
• 94.0 db calibration built-in
• Max hold: 0.7 dB
• Size: 8" x 3.2" x 1.4"; wt. 10 oz.

It uses condenser microphone for high accuracy and stability. An extra analog output signal can be used for control, data-analysis and recording. Widely used in audio system testing, heating and air-conditioning, workplace sound level testing, and highway environmental impact.