Feature: 1. [Large LED Screen] The 11in adjustable brightness LED display allows you to see real time levels of decibels, temperature and humidity. 2. [Auto Alarm Icon] The noise alarm icon will switch automatically 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. 3. [Multifunctional] This versatile noise meter can measure sound from 30 to 130 decibels, as well as humidity, temperature, and accuracy. 4. [Long USB Cable] The noise meter is powered by a 2000mAh Li ion battery and comes with a 9.8in (300cm) long USB cable for charging without worrying about the USB cable being long enough. 5. [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, homes, and offices. 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 S Temperature Range: -10℃ -50℃ Storage Temperature: -10℃-60℃ Relative Humidity: 20% - 85% Humidity Range: 20%-85% Accuracy: ±5% Charge: 5V 1000mAh Battery: Lithium ion battery 2000mAh (built in) Battery Modle: 103450 Concentration Unit Decibel: dBA Measurement Range: 30-130dBA Accuracy: ±1.5dBA Frequency Range: 50Hz-8.5kHz Frequency Weighting: A Resolution: 0.1dBA Frequency Response Range: 50Hz-8.5KHz Temperature Range: -10-50℃ Accuracy: ±1.0℃. Package List: 1 x Wall Hanging Sound Level Meter1 x USB Charging Cable1 x Hole Sticker2 x Screw2 x Expansion Screw1 x Instruction