Be confident in your purchase, we're an Authorized PCE Instruments Dealer. Highlights: Class II sound level meter Data-logging functionality Measuring range: 30 ... 130 dB Memory stores up to 32,700 readings USB port Microsoft Excel compatible Analog output The PCE 322A Class 2 Decibel Sound Meter has built-in data-logging / data-recording functionality. This makes it ideal for real-time noise measurement as well as for long-term noise exposure monitoring over time. A mini tripod is included in the the package as well as a wind noise suppressor. The recorded decibel readings help users determine if and what protective measures need to be taken to ensure overall health, safety and productivity in industrial, commercial, occupational, educational and residential environments. The sound meter can also be used to evaluate acoustics for audio installations. The decibel meter can be connected to a PC via the USB port so you can transfer the readings to a PC for detailed analysis using Microsoft Excel or the included downloadable proprietary software. The decibel meter also features an millivolt analog output for connecting to a frequency analyzer or X-Y shaft recorder. Features: IEC 61672-1 Class II sound level meter USB port for data transfer Memory stores up to 32,700 readings Fast and slow time weighting A and C frequency weightings Max, min, hold and alarm functions Date- and time-stamped measurements Analog millivolt output Heavy-duty ABS plastic enclosure Large, easy-to-read, 4-digit LCD screen Power-saving automatic shutoff 15 min. inactivity Battery allows approx. 30 hours continuous use ISO calibration available as an option. Tripod mount with 1/4-20 UNC thread Specifications: Noise levels: Low 30 ... 80 dB. Medium 50 ... 100 dB. High 80 ... 130 dB. Auto 30 ... 130 dB Dynamic range: 50 dB Display: 4-digit LCD Resolution: 0.1 dB Accuracy: 1.4 dB Sampling rate: 2 x per second Frequency 31.5 Hz ... 8 kHz Storage capacity: 32,700 readings (9 hours @ 1 second interval) Frequency weighting: A and C Time weighting: Fast (125 ms). Slow (1 sec.) Microphone type: Electret condenser Functions MIN, MAX, HOLD, ALARM Analog output: AC/DC millivolt. Headphone Data interface: USB port Automatic shutdown: After 15 minutes inactivity Operating conditions: 0 ... 40C / 32 ... 104F, 90% RH Storage conditions: -10 ... 60C / 14 ... 140F, 10 ... 75% RH Power supply: 9V block battery (for approx. 30 h continuous operation). AC power. Dimensions: 280 x 95 x 45 mm / 11.02 x 3.74 x 1.77 in Weight: Approx. 350 g / 0.78 lb Standards: IEC 61672-1 Class II What's included: 1 x PCE-322A decibel meter 1 x Wind noise suppressor 1 x USB cable 1 x Mini tripod 1 x Calibration screwdriver 1 x Battery 1 x Power adapter 1 x Carrying case 1 x User manual