[Scientific & Ergonomic Design]: Encased in shock-absorbing rubber for enhanced durability, drop resistance, and a comfortable grip, ensuring reliable performance even in demanding field conditions. High sensitivity sensing probe and sponge ball windshield design for fast response and high accurate probe, handing over professional work to professional instruments. [Integrated Multifunctionality]: Combines unit conversion, auto-ranging, Max/Min display, BT communication, data locking functions for comprehensive, user-friendly sound level assessment. Equipped with thoughtful digital LCD backlit screen for easy data reading, easy to cope with strong light, night and other harsh environments. [A-weighting/C-weighting]: Accurately emulates the frequency response of human hearing for low-intensity ( Less than 55 dB) and high-intensity mechanical noises, ensuring reliable measurement under diverse acoustic environments. [Fast/Slow Mode Selection]: Seamlessly captures fluctuating transport noise with a responsive 125 ms FAST mode or measures stable noise levels with a 1000 ms SLOW mode, presenting the effective value for precise analysis. [Versatile Applications & Enhanced Convenience]: This instrument caters to a broad range of uses, including noise, quality control, film production, construction, automotive testing, and educational settings, delivering professional-grade results with lasting cost-effectiveness. USB Charging 30-130dB A/C Weighted Digital Sound Level Meter Battery/Rechargeable Handheld Decibelimetro Decibel Noise Meter This sound level meter combines A-weighting/C-weighting, fast/slow mode adjustable, unit conversion, auto-ranging, Max/Min display, BT communication, data locking and a clear LCD screen for comprehensive, user-friendly sound level assessment. Wide applications, suitable for noise quality control, film production, construction, automotive testing, and educational settings, delivering professional-grade results with lasting cost-effectiveness. Name: Noise Decibel Tester Type: ZL82A Battery type: 3 * AAA battery (ZL82A, not included) Measuring ranges: 30-130dB Sampling rate FAST: 125ms Sampling rate SLOW: 1sec Accuracy: 1.5dB Frequency response ranges: 30Hz-8KHz Resolution: 0.1dB A-weighting/C-weighting: yes Analogue displey: yes Data hold: yes Maximum/minimum value: yes Automatic shutdown: yes Low voltage indication: yes Color: Black Material: plastic Package Contents: 1 * Noise Decibel Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.