Sound King SK7500BT - 2.2Ch Bluetooth Mixer Amplifier With Microphone Input 1. Controls - Power on/off, Volume - Balance, Bass, Treble 2.Total 4 Channels - 2 Speaker / Woofer of 8" - 4 ohms in 1 slot & 2 speaker of 4" - 4 ohms in 2nd slot 3. Frequency Response - 20 - 20khz + / - 3db 4. Mic Socket - 1 5. Power Output - 40 + 40 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