1.MP3 player function, support SD/MMC card 2.Support USB products, such as U Disk/movable hard disk. 3.With Line in jack, compatible with CD/MP3/Computer. 4.Can charge up MP3/MP4/Mobile/ 5.LCD synchronous english song text flowing display with backlight 6.Support earphone 7.With USB jack, can exchange the data with other equipments directly 8.Power Supply: AC adapter 9V(+/-10%),DC 9V(AAA battery8pcs) 1000mA 9.Max. Output Power: 2W+2W 10.Speaker Impedance: 8 ohm 11.Frequency Response: 60Hz-18KHz 12.S/N Ratio: >80db USB jack Spec. 2.0 13.Harmonic Distortion Ratio: <0.5%