Feature 1[Accurate Sound Measurement] This sound level meter utilizes a precise condenser microphone to catch sound and is equipped with A weighting functionality. Measures noise levels ranging from 30 to 130dB with an accuracy of 1.5dB. 2[Backlit LCD Display] Featuring a 1.57 inch LCD screen with backlit function, this digital sound level meter ensures easy readability, even in low light conditions. 3[User Friendly] The anti slip side design ensures easy handling of this portable noise meter, which features an automatic shut off function to conserve battery life. 4[Battery Powered] Powered by three batteries, this decibel meter shows a low battery indicator on the screen when the battery level is running low, reminding users to replace the batteries promptly. 5[Versatile Applications] Perfect for monitoring noise levels in communities, home theaters, audio systems, cars, workshops, schools, offices, and factories.Item Type: Sound Level MeterMaterial: ABSBattery Model: AAA Battery R03 x 3 (Included)Battery Capacity: 350mAh x 3Measurement Range: 30 to 130dBAAccuracy: 1.5dBFrequency Response: 31.5Hz to 8KHzFrequency Weighting: A WeightingResolution: 0.1dBWorking Temperature and Humidity: 0 to 40, 10 to 80% RHStorage Temperature and Humidity: -10 to 60 , 0 to 90% RHCondenser Microphone: YesAutomatic Power off: YesData Holding Ratio: YesLCD Backlit Function: YesMaximum Minimum Function: YesWind Resistant Ball: Machine Dipper Rod .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 Sound Level Meter1 x Wind Resistant Ball3 x Battery1 x User Manual