Features [Automatic Alarm Symbol] The noise alarm icon automatically changes when the decibel level is different. Green means less than 60dB, Yellow means 60 to 75dB, Orange means 75 to 85dB, Red means 85dB or more. [Multifunctional] This versatile noise meter can measure noise from 30 to 130 decibels as well as moisture, temperature and accuracy. Wide application: This decibel meter can be hung on the wall or placed on a table and is ideal for testing sound levels on traffic routes, construction sites, apartments and offices. Large LED screen: On the 11 inch LED display with adjustable brightness, you can display decibels, temperature and humidity in real time. [Long USB Cable] The noise meter is powered by a 2000mAh Li-ion battery and comes with a 9.8 inch (300 cm) long USB cable for charging without worrying about the USB cable being long enough. Specification: Item Type:Wall Hanging Sound Level Meter Material: ABS Display method: LED display Atmospheric Pressure: 12.5 PSI - 15.4 PSI Sampling time: 1.5 seconds. Temperature range: -10°C to 50°C. Storage temperature: -10℃-60℃. Relative humidity: 20% - 85%. Humidity range: 20%-85% Accuracy: ±5%. Charge: 5V 1000mAh Battery: 18650 2000mAh lithium ion battery (built-in) Concentration unit decibels: dBA. Measuring range: 30-130dBA Accuracy: ± 1.5 dBA. Frequency range: 50 Hz - 8.5 kHz. Frequency weighting: A. Resolution: 0.1dBA Frequency response range: 50 Hz - 8.5 kHz. Temperature range: -10-50°C. Accuracy: ± 1.0 °C. Package list: 1 x Wall Hanging Sound Level Meter 1 x USB charging cable. 1 x hole sticker. 2 x screws. 2 x expansion screws. 1 x instruction manual Package List 1 x Wall Hanging Sound Level Meter 1 x USB Charging Cable 1 x Hole Sticker 2 x Screw 2 x Expansion Screw 1 x Instruction