Feature 1MEASURE DETAILS: The decibel meter has a sensitive and accurate condenser microphone, which can measure the noise level from 30 to 130 dB with an accuracy of 0.1 dB. 2APPLICABLE SCENARIOS: The decibel meter is very suitable for measuring environmental noise, such as traffic noise, nursery noise, classroom noise, home theater noise, industrial noise, etc. The sampling rate is 2 times per second, which is very suitable for dB test under various conditions. 3BACKLIT LCD: The sound level meter has a large backlit LCD display with 4 bit and 0.1 dB resolution, ensuring that the reading is clearly visible and easy to operate in low light environment. When the sound level exceeds the set value, the backlit display will continuously flash as a visual alarm. 4EASY TO USE: The lightweight design allows long time operation and reduces muscle fatigue. The compact design ensures that the noise meter can be held comfortably in the hand. The non slip and rubberized side ensures that the decibel is easy to hold. 5AUTOMATIC SHUTDOWN: When the sound level meter is not used for about 11 minutes, it will automatically shut down to extend the battery life. And there is a indicator for you to display the battery capacity.SpecificationItem Type: Decibel MeterMaterial: ABSMeasuring Range: 30 to 130dBAMeasurement Error: 1.5dB( 94dB at 1KHz)Frequency Range: 31.5Hz to 8kHzDigital Display: 4 digitsResolution: 0.1dBSampling Rate: 2 times per secondMicrophone: 1/2 inch electret condenser microphoneFrequency Weighted: A weightResponse Time: 0.5sMaximum, Minimum: SupportData Locking: SupportHD Backlight: SupportAutomatic shutdown for 11 minutes without operationWorking Humidity: 10 to 80% RHWorking Temperature: 0 to 40 Product Power Supply: 1 x 800mAh 6F22 alkaline dry battery (shipped with supporting battery) .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 x Decibel Meter1 x Battery1 x Manual