?Precision measurement & over-range measurement warning sign?- 30~130dBA(measuring level range),31.5Hz-8KHz(frequency response),+/-1.5dB(accuracy),0.1dB(resolution).
?Min/Max/Data Hold Function? - The Sound Level Tester records the minimum and maximum sound decibels around any given time range and freezes the current measurement readings.
?Large LCD Display? - Clear readings and easy to use at night,LCD Backlight Display.Including the measuring noise value and electric quantity, easy to read and carry.
?WIDELY APPLICABLE?- Ideal for monitoring and testing noise levels at home, labs, factories, offices, theaters and for audio systems to see exactly how much you need to adjust for the surrounding sound.
?After-sale Service? If there is any quality problem, feel free to contact us and we will give you a 100% refund within 2 years of purchase. It is our intention to offer the best customer service on Amazon.