The Phonic PAA3 is a highly accurate handheld audio analyzer that gives sound engineers a rich array of sound analysis tools. Features include 31-band real time spectrum analysis, RT60, SPL sound and line meter, internal generator, EQ setting program, microphone calibration and speaker phase checking abilities. All functions and menus on the Phonic PAA3 handheld audio analyzer can be accessed through a central jog dial, leaving your other hand free to adjust audio settings. With this SPL sound meter, you can easily upload information and settings to your computer via the built-in USB interface. The large LCD screen has a visible backlight to help you see in a dark performance environment. And with a battery life of 7 hours, the Phonic PAA3 handheld audio analyzer is the multi-functional tool for every serious audio engineer.