Feature:1. It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2.2. With modern compact and portable appearance design.3. Accuracy up to 1.5dB.4. Maximum value holding function to lock up the maximum reading.5. Large LCD screen with digits reading.6. Auto power off design for energy saving. Auto backlight display.7. Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system.8. It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2. Equipped with a sponge ball.9. With modern compact and portable appearance design. Auto power off design for energy saving.10. Accuracy up to 1.5dB. Auto backlight display.11. Maximum value holding function to lock up the maximum reading. Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system.Specification:Digital Sound Level Meter Decibel Logger 30-130dBFeatures:It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2.With modern compact and portable appearance design.Accuracy up to ±1.5dB.Maximum value holding function to lock up the maximum reading.Large LCD screen with digits reading.Equipped with a sponge ball.Auto power off design for energy saving.Auto backlight display.Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system.Specifications:Measuring range: 30-130dBAAccuracy: ±1.5dBFrequency range: 31.5Hz to 8.5KHzFrequency weighting: ADigital display: 4digitsResolution: 0.1dBSample rate: 2 times/secondMicrophone: 1/2 inch electret condenser microphoneMax hold: MAXPower supply: 9V battery (the battery is not included)Power life: About 30 hours (alkaline battery)Operating condition: 0-40 10-80%RHStorage condition: -10--+60 10-70%RHProduct weight: 105gPackage weight: 130gProduct size: 14.2 * 5.3 * 3.5cmPackage size: 15.2 * 6.0 * 4.2cmPackage list:1 * Sound Level Meter1 * Sponge Ball1 * User ManualPackage List:1 * Sound Level Meter1 * Sponge Ball1 * User Manual