2.4G wireless digital surround set LCD display Full function remote control Subwoofer: Drive unit: 6.5 inches/5.25 inches (changed available) Output power: 50W Frequency: 38Hz-250Hz Impedance: 8 ohms Sensitivity: 85dB THD<0.1% Speakers: Drive unit: Front: 2.75 inches x 3 Center: 2.75 inches x 3 Surrond: 2.75 inches x 3 Output power: Front: 30W Center: 30W Surrond: 30W Frequency: 250Hz-20kHz Impedance: 8 ohms Sensitivity: 85dB