Phonic PAA6 Dual Channel Digital Audio Analyzer Nine analysis functions are easily accessed via the touch screens graphic interface Functions include RTA, LEQ, RT-60, FFT, THD N, Polarity, Phase, Scope, and Meter (dB SPL, dBu, dBV & Volt) Balanced XLR input and output connectors Detachable calibrated measurement condenser microphones Rechargeable lithium-ion battery 480 x 272 color LCD touch screen with touch pen USB 2.0 port and SD card slot included for storing and retrieving data