... daysSpecifications1, 5.1CH Home Theater System 2, USB 2.0 slot 3, RMS:105W --160W 4, PMPO:1,600W 5, Private moldProduct Description:1, 5.1CH DVD Home Theater ... -200Hz Full-range speaker driver:15W*4ohm*2.75" Frequency:180Hz-20KHzS/N Ratio:≥85dBDistortion rate :1% 5.1 ch home theater speaker system with usb,sd card ...