Karaoke amplifier, professional power amplifier, professional audio sound equipment, pro audio sound system, pa audio system, stereo amplifier. 1. Set up volume automatically, with wireless remote controller.  2. Auto vocal changing & MULTI-Sounding 3. 5-Microphone inputs (front 3, rear 2) 4. DSP digital echo, delay time and repeat control.  5. Suit for karaoke engineering and computer song selecting system,  External connect receiver control system of remote control.  6. Built-in BMB remote control code, apply to professional system for choosing song.  7. Unique radiaton design of tunnel induced draft more stable and reliable.  8. RMS output power is 180W, power crashing.  9. Rated power: 180W+180W(8ohm) 10. Advanced and reasonable inside construction, smart circuit, delicate workmanship.