1. High precision and fast response: The response time of the noise meter is less than 1s, and the ultra-fast response allows you to easily obtain real-time and accurate sound test values in various environments. The measurement range is 30-130dB, the accuracy is 0.1dB, and the resolution is 1dB.2. Automatic shutdown and overload alarm: If there is no operation within 10 minutes, the noise meter will automatically shut down to save power. Overload alarm, when it is less than 30 dB, the screen displays UN when it is greater than 130 dB, the screen displays OL.3. Data retention and max/min lock: Short press the M key to easily switch between max/min/real-time mode. The button H (Hold) can freeze the decibel value currently measured on the screen, which can meet your various measurement needs.4. Easy to operate: The simple design with 4 function buttons makes the handheld noise meter very easy to use. The ergonomic handheld arc and ultra-lightweight design bring you a comcompatible withtable handheld experience.5. Large LCD display: The large LCD display with backlight function can provide clear readings, so you can get data under any light.6. Applicable occasions: The noise meter is an perfect measurement tool compatible with sound testing, which is widely used in factories, workshops, schools and homes.Specification:Product name: Noise meterMeasuring range: 30dB-130dBMeasurement accuracy: 0.1dBWorking temperature: 0-40 CelsiusResolution: 1dBPower supply: 1 X 9V battery (not included)Colour:blackMaterial:plasticPackage Contents:1 * Noise TesterOnly the above package content, other products are not included.Note: Light shooting 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.