Features 【LCD Display】: The sound level tester can measure internal or external noise, with a large digital LCD display, providing clear readings. 【Measurement range】: The measurement range of the wall-mounted decibel noise meter is 30~130dB, and it has the function of flashing indicator light and buzzer alarm. 【Accurate Data】: Use the SW-525A device to measure internal or external noise, helping you to obtain sufficient and accurate data in time. 【Wall Mount】: The size of the USB wall mount sound level meter is about 210*130*30mm/8.3*5.1*1.2in. There are hanging holes on the back, which can be hung on the wall to save space. 【Wide application】: The sound level meter can be used to measure the noise of various occasions and electrical appliances, such as factories, offices, houses, traffic routes, audio systems, air conditioners, refrigerators, etc. Features: 1. The sound level tester can measure internal or external noise, with a large digital LCD display that provides clear readings. 2. The measurement range of the wall-mounted decibel noise meter is 30~130dB, and it has the function of flashing indicator light and buzzer alarm. 3. Use SW-525A device to measure internal or external noise, help you get enough and accurate data in time. 4. The size of the USB wall-mounted sound level meter is about 210*130*30mm/8.3*5.1*1.2in. There are hanging holes on the back, which can be hung on the wall to save space. 5. The sound level meter can be used to measure the noise of various occasions and electrical appliances, such as factories, offices, houses, traffic routes, audio systems, air conditioners, refrigerators, etc.   Specification: Condition: 100% Brand New Model: SW-525A Measuring Range: 30-130dB(dB) Accuracy: ±1.5 dB (In standard sound 94db @ 1khz) Frequency Response: 31.5Hz-8.5khz Frequency Weighting: A Response Time: Fast Microphone: 6 Mm Condenser Microphone Power: DC 5V 1A Micro USB Operating Environment: 0-40℃ 10-80% RH Storage Temperature and Humidity: -10~60℃ 10~70% RH Weight: Approx. 608g / 21.8oz Size: Approx. 210 * 130 * 30mm / 8.3 * 5.1 * 1.2in   Package List: 1 * Sound Level Meter 1 * User Manual 1 * USB Cable Package List 1 * Sound Level Meter 1 * User Manual 1 * USB Cable