Sound King SK 4000 - 2 Ch Mixer Amplifier With Microphone Input 1. Controls - Power on/off, Volume - Balance, Bass, Treble 2.Total 2 Channels - 2 Speaker / Woofer of 6" - 4 ohms in 2 slots 3. Frequency Response - 20 - 20khz + / - 3db 4. Mic Socket - 1 5. Power Output - 20 + 20 W 6. Power Source - Corded 7. Power Requirement - 220 -230V (AC) 8. Cooling - Heatsink 9. Audio Input - 3.5 Mm Aux & 4 RC Socket 10.Circuit Design - IC & Transistor 11. Compatibility - Can be connected to PC, Walkman, TV, VCD / DVD players, etc.