Tenma 72-947 Sound Level Meter w/ USB Interface

Digital sound level meter with USB interface. It is perfect for sound system testing, speaker system measurement and environmental noise level monitoring. This is designed to meet the measurement requirements of safety engineers, health, industrial safety offices and sound quality control in various environments. 4 digits LCD display with a resolution of 0.1dB and 2 times/sec display update Removable windscreen and 1/2" electret condenser microphone Threaded insert for tripod mount Selectable min or max hold and data hold function Internal datalogging AC/DC outputs for level recorder Self-calibration with internal oscillator Selectable fast/slow response time Powered by 9V battery (006P or 6F22 or 1604) 12-month limited warranty *view Terms & Conditions for details Specifications Standard Applied: IEC61672 -1 Class 2 Accuracy: ±1.4dB Frequency Range: 31.5Hz to 8kHz Dynamic Range: 50dB Memory: 32700 Readings Level Ranges: Low: 30db to 80dB; Medium: 50db to 100dB; High: 80dB to 130dB; Auto: 30dB to 130dB Frequency Weighting: A & C Time Weighting: Fast: 125ms; Slow: 1s Microphone: ½ inch electret condenser microphone Display: 4-digits LCD display with a resolution of 0.1dB Display Update: 2 times/sec. Max. Hold: Hold the Maximum readings Min. Hold: Hold the Minimum readings Hold: Hold the readings Alarm Function: “OVER” is when input is more than upper limit of range “UNDER” is when input is less than lower limit of range Analog Output: AC/DC outputs from earphone outlet AC=1Vrms, DC=10mV/dB Data Output: USB data traffic Auto Power Off: Meter automatically shuts down after approx. 15minutes of inactivity Power Supply: One 9V Battery, 006P or IEC 6F22 or NEDA 1604 Power Life: About 30hours Operating Temperature: 0°C to 40°C (32°F to 104°F) Operating Humidity: 10 to 90% RH Storage Temperature: -10°C to 60°C (14°F to 140°F) Storage Humidity: 10 to 75% RH Dimensions: 278mm × 76mm × 50mm Weight: 350g Includes: Instruction Manual, Battery, Screwdriver, Ø3.5mm earphone plug, Windscreen, Software, USB Cable