Feature Built-in 2.1 channel HI-FI amplifier full frequency design High quality full frequency satellite and deep bass speaker combination Input:RCA jacks Volume, bass individual adjustment audio/audio&USB decode two model select blue LED ring display Specification Channel 2.1CH Speakers Subwoofer:4"*1 Satellite: 3" *2 Output (RMS THD=10%) Subwoofer: 12W Satellite : 5W×2 Input sensertity Subwoofer: 250mv Satellite : 450mv Frequency response 60HZ--20KHZ IC TDA2030A*1,TDA2025*2 Transformer EI 48*35 Packing QTY/CTN 4 Gift box 426*288*205mm Carton box 591*442*432mm QTY/20 1010 QTY/40HQ 2420 Net Weight 15.8KGS Gross Weight 17.5KGS Reomote control NO SHIPMENT DATE 30 days.