5.1 ch amplifier Real 5.1 channel input/output LCD display Tower speaker made of Plastic 6 channel separated remote control Highly magnetically ??Ohielded Tower speaker: Drive unit: front : 3 inch X 4 + 1 tweeter surround & Center : 3inch X 2 +1 tweeter Frequency:250Hz-20KHz Sensitivity:87dB Impedance: 8 Ohm Power: front : 45 watts , surround and center 25 watts 10. Subwoofer: Drive unit: 8 inch Frequency:38Hz-250Hz Sensitivity:87dB Impedance: 8 Ohm Power: 60W (RMS) THD:<1% decoder or FM radio (optional) 2.4GHz wireless surround speaker (optional)