Decibel Meter Sound Level Reader (30~130dB, ±1.5dB) with Humidity & Temperature — Wall-Mount Classroom SPL dB Meter

AUTO Alarm Icons: visual alarm colors change automatically based on measured sound level — Green: Less than 60dB; Yellow: 60~75dB; Orange: 75~85dB; Red: More than 85dB. Accuracy & Ranges: Decibel Level Measuring Range: 30~130dB with Accuracy: ±1.5dB. Frequency response range: 50Hz ~8.5KHz. Temperature Range: 14~140°F. Humidity Range: 20~85%. Display & Mounting: A large, high-definition backlit LCD makes readings easy to see at a glance. Designed for continuous monitoring, this unit is wall-mountable for permanent placement or can sit on a table thanks to its flat bottom. It provides a clear alternative to handheld sound meters for ongoing noise tracking. Power & Portability: Use it plugged in with the included 10ft power cord, or operate unplugged for hours on the built-in 2000MaH battery. Versatile Use: Ideal for classrooms and other public spaces as a noise monitor, it also works well as a home theater SPL meter or in a garage workshop. Additional Features: Includes onboard HUMIDITY and TEMPERATURE readings alongside decibel monitoring. Three ADJUSTABLE SPEEDS (1. Fast 2. Medium 3. Slow) let you tailor the response time for smoother or more immediate measurements.