This sound level meter is designed to meet the measurement requirements of safety engineers, health and industrial safety professionals, and o quality control specialists in various environments, including factories, offices, traffic areas, homes, and o systems. Portable and built for durability with anti-drop, anti-skid, and anti-static features, it is ergonomically designed for comfortable single-handed operation. Features a large LCD display with backlight for clear visibility in low-light conditions. The modern, user-friendly interface is simple to operate and easy to read, even in the dark. Automatically powers down after several minutes of inactivity to extend battery life and includes a low battery indicator. Engineered for accurate sound level measurement from 30dBA to 130dBA with ±1.5dB accuracy. Equipped with a 1/2 inch capacitive microphone and A-weighted frequency response from 31.5Hz to 8.5kHz. The LCD screen includes a light sensor that adjusts display brightness according to ambient lighting conditions. Product includes: 1 x Sound Level Meter 1 x Instruction Manual Condition: Item Type: Sound Level Meter Material: ABS Measurement Range: 30~130dBA Accuracy: ±1.5dB Digits & Resolution: 4 digits, 0.1dB Frequency Response: 31.5Hz ~ 8.5kHz Frequency Weighting: A Sampling Rate: 2 times per second Microphone: 1/2 inch capacitive microphone Power Supply: 1 x 9V battery (not included) Size: Approx. 57 x 36 x 149mm (2.2 x 1.5 x 5.9in) Weight: Approx. 122g (4.3oz)