Description [Easy To UseWindows Compatibility]-Decibel Meter with PC Interface is compact and easy to use while providing you an accurate readings in a greater range than similar inexpensive sound meters on the market;Windows 10, 8, 7, Vista and XP (Do not run in Mac OS)[Accurate measurement] - Measuring range: 30dBA-130dBA, Frequency 31.5Hz - 8.5KHz; Accuracy: +/- 1.5dB; Resolution: 0.1 dBA; Fast or slow mode selection for fast response time of 250vrms, 1 second slow response speed to increase accuracy[Multi-Function] - The device has automatic range switching, analogue bar display, choice of A/C frequency weighting and dynamic speed selection. Range excess, data storage, backlight, low voltage display, maximum and minimum, etc.[LCD backlight display] - This meter provides clear and easy readability even in the dark, 4 x 1.5V AAA battery operated system (not included).[Maximum / Maintain Function] - With the sound level meter, you can record the surrounding minimum and maximum sound decibels in any time range; the holding function freezes the current measured value, so you do not have to copy these decibel values. Decibel Meter, Professional Digital Sound Level Meter Decibel with Backlit Display High Accuracy Measuring 30dB-130dB with Data Record Function