11 inch LED Display with adjustable brightness, which could see the real-time level of Decibel, Temperature and HumidityNoise Alarm Icon will automatically switch when the decibel level at different level. [Green Icon]Less than 60dB;[Yellow Icon]60~75dB;[Orange Icon]75~85dB;[Red Icon]More than 85dBDecibel Level Measuing Range: 30~130dB , Accuracy: 1.5dB, Frequency response range: 50Hz ~8.5KHz; Humidity Range: 20~85%, Accuracy: 5%; Temp. Range: -10~50, Accuracy:1.0;Powered with 2000mAh Lithium battery, 9.8 feet(300 cm) length USB cable for charging, Don't worry the USB cable is not length enough.This Large LED display Decibel Meter can be hung on the wall or placed on the table, it's a perfect noise meter to test the sound level in Classroom, Studio room, traffic routes, factories, construction site, home, offices, etc.color:WhiteMaterial:ABSPackage Contents:1 x decibel meter1 x English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.