Features: A/C frequency weighting selection Fast/Slow time weighting selection Three-color light alarm MAX/MIN/HOLD Function Data storage function - 43,000 data record Data read and delete Automatic shutdown can set and also shutdown when battery runs out Data and time display (year-month-day-hour-minute-second) Line chart with visual noise data changes Alarm light function (High/Low alarm value) Green: does not exceed yellow(low)alarm value Yellow: exceed the yellow(low) alarm value Red: exceed the red(high) alarm value USB charging and PC communication compatible with the following OS: Microsoft Win 7, 10 and 11 for data record download real-time data sampling analysis printing graph and data function DC output Standard approval: International Electrician Committee standard: IEC PUB 651 TYPE2 US national standard: ANSI S1.4 TYPE2 Tripod fixed screw aperture Type-C interface Specifications: Calibration sound source: 94dB@1KHz Measurement range: 30~130dB (A), 35~130dB (C) Accuracy: ±1.5dB (Reference sound pressure standard, 94dB@1KHz) Resolution: 0.1dB Frequency Weighting: A/C Frequency Response: 31.5~8500Hz Time-weighting: FAST/SLOW Sampling rate: FAST- 8 times/second ; SLOW - 1 times/second Rated current: 70mA Standby current: 5uA Power supply: 3.7V lithium battery / 1000mAh Charging time: 1.5h Duration of service: 8h Data storage: 43,000 Microphone: 1/2-inch polarization capacitance microphone Operating Environment: 0~50°C; 10~80% RH Dimension: 160 x 56 x 31mm (excluding sponge ball) Weight: approx. 114gms (excluding sponge ball)DC output: Output the noise value by voltage mode according to proportionDC voltage range: 300mV~1300mV DC voltage error: ±5mV DC impedance: 120R DC and noise relationship: Vout=dB x 10 unit: mV (dB: noise value, Vout: DC output voltage) Set Includes: 1 x Sound Level Meter 1 x Windproof Sponge ball 1 x USB Cable English Instruction Manual Standard factory packaging
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