Feature 1Wide Application:Decibel meter can be used to measure noise, such as engineering, schools, hospitals, shopping malls, theaters, offices, road traffic, homes, stereos, etc. 2High Accuracy: Sound level meter can accurately detect noise, with a measuring range from 30 to 130dBA and a shift function, so it is practical. 3LCD Screen: Noise level meter adopts LCD screen, which can clearly display the numerical value and has good anti interference. 4Backlight Function: Sound monitor has backlight function, saves electricity, and is suitable for collecting sound data at night. 5Data Transmission: Noise detector can perform data transmission function through USB data cable, and upload it to the computer for analysis.Item Type: Decibel MeterMaterial: ABSProduct Size:Approx. 7 x 3.5 x 24.5cm / 2.8 x 1.4 x 9.6inPower Supply: 5V USB Power CordBattery Model: 4 x 1.5V AA Battery (Shipped Without Battery)Measuring Range: 30-130dBa or 35-130dBc (suitable for Noise Detection in Any Aspect)Measurement Accuracy: 1.5dBThe Frequency: 31.5HZ-8.5HZShift Switches: 30-80dB,40-90dB,50-100dB,60-110dB,70-120dB,80-130dB,30-130dBDigital Display: 4 DigitsResolution: 0.1dBDisplay: LCD DisplayUses:For Engineering, Schools, Hospitals, Shopping Malls, Theaters, Offices, Road Traffic, Homes, Acoustics, Etc.Weight: Approx. 360g / 12.7oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xDecibelMeter1 x USB Power Cord1 x CD1 x User ManualNoteShipping without batteries