Features:1. Large digital LCD display that provides clear readings2. Measuring range is 30~130dB, with indicator flashing and buzzer alarm function3. The device can measure internal or external noise4. 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: Brand NewModel: SW-525AMeasuring Range: 30-130dB(dB)Accuracy: 1.5 dB (In standard sound 94db @ 1khz)Frequency Response: 31.5Hz-8.5khzFrequency Weighting: AResponse Time: FastMicrophone: 6 Mm Condenser MicrophonePower: DC 5V 1A Type C USBOperating Environment: 0-40 10-80% RHStorage Temperature and Humidity: -10~60 10~70% RHWeight: Approx. 608g / 21.8ozSize: Approx. 210 * 130 * 30mm / 8.3 * 5.1 * 1.2inPackage List:1 * Sound Level Meter1 * User Manual1 * USB CableNote: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..