1Large digital LCD display that provides clear readings 2Measuring range is 30~130dB, with indicator flashing and buzzer alarm function 3The device can measure internal or external noise 4There are hanging holes in the back, which can be hung on the wall to save space. 5Can be used in measuring noise of various occasions and appliances such as factory, office, home, traffic route, acoustics, air-condition, refrigerator, etc. Features: 1.Large digital LCD display that provides clear readings 2.Measuring range is 30~130dB, with indicator flashing and buzzer alarm function 3.The device can measure internal or external noise 4.There are hanging holes in the back, which can be hung on the wall to save space. 5.Can be used in measuring noise of various occasions and appliances such as factory, office, home, traffic route, acoustics, air-condition, refrigerator, etc. Specification: Condition: 100% Brand New Model:SW-525A Measuring Range: 30-130dB(dB) Accuracy: 1.5 dB(In standard sound94db @ 1khz) Frequency Response: 31.5Hz-8.5khz Frequency Weighting: A Response Time: Fast Microphone: 6 Mm Condenser Microphone Power: DC5V 1A Micro USB OperatingEnvironment: 0-4010-80% RH Storage Temperature and Humidity: -10~6010~70% 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 Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.