HABOTEST HT64 Sound Level Meter Portable Decibel Meter A-Weighted Noise Detector 30-130dB Mini Decibel Monitoring Device High Accuracy Sound Level Meter Digital Display with Backlight The sound level meter is a mini sound level meter with stable and reliable performance. Widely used in health prevention, noise engineering and other environmental noise detection, such as factories, schools, housing,roads and other occasions. Features: High Precise Sensor: The decibel meter is made of high-precision chip, which has a wide measuring range of 30-130dB and a high accuracy of ±1.5dB. Built-in capacitive microphone sensor, wide sound collection range, strong anti-interference ability, high sensitivity and accuracy. Fast and Slow Measurement: The sound level meter has the function of converting the fast and slow response rate. The fast response rate uses a time constant of 125ms/time for general environmental measurement. The slow response rate uses a 1s/time constant, which is used for environmental measurements with relatively large changes in noise levels. 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. Multifunction Design: It can measure and record the maximum and minimum values, and has the function of automatic shutdown without operation for 10 minutes and low battery indication, which is convenient and practical e. The sound level meter is equipped with LCD digital screen with backlight, which is convenient for data reading. 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 ergonomic, easy to grip, comfortable e, not easy to wear. Small And Portable: It is light weight and easy to carry, making it a fine tool for monitoring noise intensity, suitable for sound quality control in factory, office, home, school and construction site. Specifications: Frequency Response: 30Hz-8KHz Dynamic Range: 50 dB Measuring Range: 30-130dB Sound Pressure Accuracy: ±1.5dB (94dB@1KHz), ±5dB (94dB@8KHz) Weighting Properties: A Dynamic Characteristics: FAST 125ms, SLOW 1sec Microphone: Polarized capacitance microphone Max/Min: √ Auto Power Off: √ Low Battery Indication: √ Power: 2 * 1.5V AAA Batteries(not included) Safety Rating: EN61326-1 Use Environment: 0-50℃/<80% humidity, altitude<2000m Storage Environment: 0-50℃/<70% humidity(remove battery) Material: ABS Item Size: 187 * 32 * 31 mm / 7.36 * 1.26 * 1.22 inch Item Weight: 47g / 1.66oz Package Size: 21.6 * 5.6 * 4.4 cm / 8.5 * 2.2 * 1.73 inch Package Weight: 93g / 3.28oz Package List: 1 * Sound Level Meter 1 * User Manual (English)