... driver:woofer 4 inch,satellite3inch*23,Frequancy response:40HZ-20KHZ4,S/N:<70dB5,Dimension:wooferW270*225*225mm,satellite98*130*222mmPackage: Color box ... *370*675mm/4sets Quantity:1550sets/40HQ 2.1 Piano home theater system speaker ,With usb ,sd ,vfd display, fm , karaoke , mini remote function