Features: 2.0 Ch Multimedia Speakers High Quality Stereo Sound Magnetically Shielded Built-in Power Supply Convenient Power & Volume Control Button Specifications Power Output: 4 Watts (2W*2) Frequency Response: 100Hz~20KHz Signal to Noise Ratio: 60dB Input Sensitivity: 300~500mV Input Port: 3.5mm Line-in, Headphone Jack, DC-in Power Input: AC 220V 50Hz, DC 9V / 600mA Dimensions: 100(W) x 100 (H) x 96 (D) mm