Frequency response: 60Hz to 20KHz Amplifier output power: Left/right 4W x 2, subwoofer 15W x 1 Amplifier input sensitivity: ≤ 400mV Amplifier SNR: ≥ 82dB Amplifier distortion: ≤ 0.7% Power voltage: AC 110 to 240V, 50/60Hz Key features: Made for iPod, iPod docking station for synchronization and charging Line in feature for all iPod classic, iPod shuffle, iPod Nano 3.5mm stereo audio-in connection for connection with a computer or other auxiliary audio devices such as an iPod, PSP, MP3, MP4 or CD. Featuring the touch sensitive to control volume on left/right ears Remote control Bass controls. Subwoofer 15W x 1 Five speakers with power sound Product size: D16 x W16 x H14.5cm Product weight: 1.4kg