WIDE 11IN WALL MOUNTED LED DISPLAY Unlike portable sound level meters, our decibel reader is wall mounted and perfect for continuous monitoring. The noise decibel meter is equipped with an 11-inch screen and adjustable brightness, so you can effortlessly read it throughout the day at your convenience. 3 IN 1 MULTIFUNCTIONThe multifunctional dB meter can measure sound from 30 to 130 decibels, as well as humidity and temperature. The sound alarm icon automatically switches when the decibel level is different, green means less than 60 dB, yellow means 60-75 dB, orange means 75-85 dB and red means 85 dB or more. HIGH PRECISIONThis sound level meter uses an advanced sensor to test the values of decibel, temperature and humidity. It is more sensitive, precise and stable. Measuring range is 30~130dB, accuracy: 1.5dB; Humidity Range: 20~85%, Accuracy: 5%; Temperature range: 14 ~ 122, accuracy: 5%. The sampling time is 1.5 s. WIDE APPLICATION LED display noise temperature humidity meter can be used in noise engineering, quality control, health control and various environmental tests. It is powered by a 2000 mAh Li-ion battery and comes with a 9.8 inch (3 meters) long USB cable for charging. Widely applicable for staff, classrooms, families, studies, industry, etc. AFTER-SALES SERVICECustomer satisfaction is our top priority. If you have any questions about our sound level meter, please do not hesitate to contact us. We will reply to you as soon as possible within 24 hours and provide you with a satisfactory solution. 100% Quality Guarantee: You can get a full refund if you are not satisfied.