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: ABS Measure Range: 30~130dBA, 35~130dBC Frequency Response: 31.5Hz~8.5kHz Accuracy: ±1.5dB (refer to sound calibration frequency, 94dB@1KHz) Frequency Weighting: A or C weighting Digital Display: 3 large LED digital display Resolution: 0.1dB<100dB, 1dB>100dB Display Mode: Fast and slow selectable Microphone Type: Dia. 6mm ECM type Alarm Mode: Built in alarm buzzer Operation Voltage: USB DC5V 1A Operating Temperature & Humidity: 040, 10%80%RH Storage Temperature & Humidity: 060, 10%70%RH Power Supply: 5V 1A AC/DC adapter Item Size: 221 * 66 * 32.5mm / 8.70 * 2.60 * 1.28in Item Weight: 518g / 18.28oz Package Weight: 701g / 24.74oz Package Size: 24.5 * 9.2 * 5.2cm / 9.65 * 3.62 * 2.05in Package List: 1 * Sound Level Meter 1 * USB Cable 1 * User Manual(English)