Want to test the sound level? Need to know the noise level? Try our digital sound level meter. This sound level meter can be apply to measure the noise level at different area such as home, school, factory, office room, music room, shopping mall, and more.Features:9.5 super large full screen LCD with large bold red font to display for easy reading.24 hours real-time monitoring the sound level.Support hanging on the wall(recommended) or free standing on the desk.Wide measurement range from 30dB to 130dB, Frequency: 31.5Hz - 8KHz, Resolution: 0.1dB/1dB, Accuracy: 1.5dB.with A and C equivalent weighted sound pressure levels.Fast and slow dynamic characteristic mode.with maximum/minimum value measurement.Buzzing and flashing to remind you when the real time measurement is reach to the alarm level, and hold the data for 3s then back to normal mode.Suitable for checking and monitoring the sound level for personal, families, business, studies, industrial, etc.Specifications:Material: ABSMeasure Range: 30~130dBA, 35~130dBCFrequency Response: 31.5Hz~8.5kHzAccuracy: 1.5dB (refer to sound calibration frequency, 94dB@1KHz)Frequency Weighting: A or C weightingDigital Display: 3 large LED digital displayResolution: 0.1dB100dBDisplay Mode: Fast and slow selectableMicrophone Type: Dia. 6mm ECM typeAlarm Mode: Built in alarm buzzerOperation Voltage: USB DC5V 1AOperating Temperature & Humidity: 040, 10%80%RHStorage Temperature & Humidity: 060, 10%70%RHPower Supply: 5V 1A AC/DC adapterItem Size: 221 * 66 * 32.5mm / 8.70 * 2.60 * 1.28inItem Weight: 518g / 18.28ozPackage Weight: 701g / 24.74ozPackage Size: 24.5 * 9.2 * 5.2cm / 9.65 * 3.62 * 2.05inPackage List:1 * Sound Level Meter1 * USB Cable1 * User Manual(English)