1. Intelligent Surface Mount Technology 2. Heavy duty double side PC board 3. Full function RF wireless card-model remote controller 4. Volume control and mute function 5. Front, rear, left and right balance control 6. Bass and treble adjustment 7. 3D surround effect 8. Loudness ON/OFF control 9. Supper bass switch 10. Bass signal output 11. Status recall function 12. Can drive 2 Ohm load stably 13. Short circuit, overload and over-temperature protection 14. Double High speed cooling fan with intelligent temperature control technology 15. Front channel HPF/LPF switch with adjustable frequency 16. Rear channel LPF switch with adjustable gain 17. Toughened glass panel with Lighting logo 18. Variable Input Level (0.2V - 5V) 19. Heavy duty terminal connectors