Product Detail Powerful dual channel palm-size audio analyzer 0 x 272 color LCD touch screen Two built-in highly accurate, omni-directional condenser mics Tone generator includes pink noise, white noise, sine wave, sweep, polarity, triangle and square Useful functions include RTA, LEQ, RT-60, FFT, THD+N, Polarity, Phase, Scope and Meter (dB SPL, dBu, dBV & Volt) . The "Phonic PAA6 Dual Channel Digital Audio Analyzer" is best product for you. We recommended Phonic PAA6 Dual Channel Digital Audio Analyzer