... /duble tracks amplifier/touch screen,blue backgroud LCD,support MP3,USB,CD,walkman etc. ITEM NO.YY-5029DSMotor3.5HP Quiet Direct Current ... .Sports AmountFeaturesHigh-low tone/Double tracks/ support MP3,USD,CD,Walkman etc. folded by manualSpeed shortcut key3KM/6KM/9KM/12KM/15KMIncline ...