This instrument is a high-precision sound level meter with an accuracy of up to 1.5dB and a resolution of 0.1dB. Temperature measurement function and temperature unit selection (C/F).Red backlit alarm clock and audible alarm function. This digital sound level meter has stable and reliable performance. The measurement range is from 30dB to 130dBA. When the measurement data exceeds the standard, an alarm reminder will be issued.Data saving function, maximum and minimum value measurement. LCD display with backlight, easy to use at night.Low battery indicator, automatic and manual power off function. Small and lightweight, easy to hold and carry.Equipped with sponge ball to protect the sensor. Applications include: environmental measurements, law enforcement, workplace design, sound level analysis of machinery and engines.