Sound meter features an 11" brightness-adjustable LED display that lets you see real-time levels of decibels, temperature and humidity. LARGE DISPLAY: Sound meter features an 11 brightness-adjustable LED display that lets you see real-time levels of decibels, temperature and humidity. Now you will have the exact numbers to prove that you need to tell your kids, co-workers or that noisy neighbor that the sound needs to be lower. AUTO ALARM ICON: The noise alarm icon automatically switches when the decibel level is different. Green means less than 60 decibels, yellow means 60 to 75 decibels, orange means 75 to 85 decibels, and red means 85 decibels or more. THREE IN ONE: This multifunctional Decibel Meter can measure sound from 30 to 130 decibels, as well as humidity and temperature (temperature range: -10C - +50C, humidity range: 20% - 85%) WIDELY USED: This noise meter can be hung on the wall or placed on a table, and is the ideal noise meter for testing sound levels in homes, offices, classrooms, studios, major traffic routes, factories, construction sites, etc. LONG USB CABLE: This noise monitor comes with a 9.8 (300 cm) long USB cable, so you don't have to worry about the USB cable not being long enough when charging.