Sensor: 1/2 inch condenser microphoneMeasuring range: 30~130dBA / 35~130dBCMeasurement accuracy: ±1.5dBFrequency response 31.5HZ~8.5KHZFrequency weighting: A&CAC signal output: 0.707Vrms/full scale for each file, output impedance is about 600 ohmDC signal output: 10mV/dB, output impedance is about 100 ohmOverload reminder: YesBacklight/low battery display: YesDigits and resolution: 4 digits & 0.1dB, sampling frequency 2 times/secTime weighting: Fast / SlowMeasurement gear selection: Yes (30-130dB, 30-80dB, 50-100dB, 80-130dB)Maximum lock: YesMinimum lock: YesAutomatic shutdown: Yes (automatic shutdown after 10 minutes of no operation)Size: 224*66*33mmPower supply: 9V batteryNote:1. Please Allow 1-3cm Differs Due To Manual Measurement.2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.Please refer to the received product. Thank you for your understanding.Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.Please refer to the received product. Thank you for your understanding.