... restore function:support software upgrades function;Signal-to-noise ratio greater than or equals to 90dB 15.The longest playing time:28 ... 6-7 hours for video output,12hours for e-book reader,about3500pages. 16.Languages supported:simplified Chinese,English,Chinese traditional,and ... :power,packing bag,USB,internal memory:2GB, manual,earphone,warranty card. 18.Charger: Input:AC100-240V,50/60Hz Max:150mA. ...