Protmex Decibel Meter/Sound Level Reader, MS6708 Portable Digital Sound Level Meter Reader, Measurement Range 30-130 dBA, Accuracy 1.5dB, Noise Meter with Large LCD Screen Display Fast/Slow Selection This sound level meter is used to measure the sound level of sound equipment in Work and Life: such as factories, workshops, schools, residential, office areas, traffic roads, audio and other occasions. Also applies to noise engineering, product quality control, health control and so on. The Protmex Noise Meter With the backlight feature, it is appropriate for gathering the sound data at night. To save power, backlight auto power off function is provided. The Decibel meter utilizes a electric condenser microphone to monitor sound levels from 30 to 130 decibels at an accuracy of +/-1.5 dB with a 0.1 dB resolution. A and C weighting network selection. Maximum (MAX) locking function; Digital display, good anti-interference performance, power saving The Protmex sound meter weighs less than 7 ounces, and is designed to fit comfortably in the palm of your hand.