Product Detail 11-Step Digital Key Controller with 1/2 Tone Per Step Support digital S/PDIF input (PCM 44.1KHz, 48KHz) 4 RCA A/V inputs & 2 RCA A/V outputs 1 RCA Record output & 1 RCA Surround Sound Output 1 External Remote Control Signal Input . The "Acesonic KM-360 Professional DSP Karaoke Mixer" is best product for you. We recommended Acesonic KM-360 Professional DSP Karaoke Mixer