1) Build in USB & RS 485 COM 2) Program Function; Recall Function; Copy Function; Save Function; Password Function. 3) 6-band EQ: Frequency, gain & Q fact are adjustable; Gain can be adjusted from -20 dB to +20 dB. 4) 96k Hz sampling frequency, 24-bit A/D and D/A converter, 32-bit DSP digital sound processor