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. Specification: Item Type: Sound Level Meter Material: ABS Battery Model: AAA Battery R03 x 3 (Included) Battery Capacity: 350mAh x 3 Measurement Range: 30 to 130dBA Accuracy: ±1.5dB Frequency Response: 31.5Hz to 8KHz Frequency Weighting: A Weighting Resolution: 0.1dB Working Temperature and Humidity: 0℃ to 40℃, 10 to 80% RH Storage Temperature and Humidity: -10℃ to 60 ℃, 0 to 90% RH Condenser Microphone: Yes Automatic Power off: Yes Data Holding Ratio: Yes LCD Backlit Function: Yes Maximum Minimum Function: Yes Wind Resistant Ball: Machine Dipper Rod. Package List: 1 x Sound Level Meter1 x Wind Resistant Ball3 x Battery1 x User Manual