Satellite – 1.5Ó Silk dome tweeter – 3Ó Mid-range driver USB – USB 5V power port – Support Bluetooth Audio Receiver – Recharge your Smartphone or Tablet Sub-woofer – Built-in 5.25Ó subwoofer driver – Long throw bass cabinet design In-Line volume Control Satellite Output Power (RMS): 18W Subwoofer Output Power (RMS): 30W Satellite Frequency Response: 130Hz-20Hz Subwoofer Frequency Response: 56Hz-150Hz Satellite Driver Size: 2 x 3″ + 2 x 1.5″ Tweeter Subwoofer Driver Size: 5.25″ (Magnetic Shielded) Satellite Impedance: 4? Subwoofer Impedance: 4? Voltage: 220V-240V, 50Hz Warranty Period: 1 year