It is a digital mini sound level meter, which can convert ambient sound into electrical signals, process data and displays results on digital display. The performance is stable and reliable measuring instrument. It is lightweight, compact, and portable, without the limit of time and place. Ergonomic, and user friendly, which can be widely applied in environmental protection, occupational health, industrial enterprises, scientific research and teaching fields, used for measuring environmental noise, machinery noise measurement and measurement of architectural acoustics. Features: Lightweight Design: It is light weight and ergonomic, making it a fine tool for monitoring noise intensity, suitable for sound quality control in factory, office, home, school and construction site. High Precise Sensor: Built-in capacitive microphone sensor with high sensitivity and accuracy. Digital Screen with Backlight: Equipped with thoughtful digital screen with backlight, large screen display for easy data reading, easy to cope with strong light, night and other harsh environments. Multifunction Design: It can measure and record the maximum and minimum values, supports data retention, with automatic shutdown and low battery indicator functions, convenient and practical to use. Windproof Sponge Design: The microphone is designed with a windproof sponge, more accurate sound collection, filtering the impact of wind on the sound. Comfortable Grip: Soft rubber keys design, and the anti-slip sides ensure the decibel meter is easy to grip, comfortable to use, not easy to wear. Multi-field Applications: The dB meter is A-weighted, which is suitable for the measurement of environmental noise, such as traffic noise, baby room noise, classroom noise, home theater noise, industrial noise, workshops noise, office areas noise, and so forth. Specifications: Name: Decibel Meter Material: plastics Battery: 3 * AAA batteries (not included) Frequency response: 31.5Hz-8KHz Measuring ranges: 30-130dB Accuracy: +/-1.5dB(94dB@1KHz) Display resolution: 0.1dB Operating temperature: 0-40celsius Operating humidity: 10-90percent RH Storage temperature: -10 to 60celsius Storage humidity: 10-75percent RH Item size: 150 * 53 * 35mm / 5.91 * 2.09 * 1.38in Item weight: 84g / 2.96ounce Package size: 170 * 60 * 42mm / 6.69 * 2.36 * 1.65in Package weight: 122g / 4.30ounce Packing List: 1 * Decibel Meter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.