1.without memory, support card intserted and listen to music 2.support MP3 format /wma/amv 3.fast delivery & lower price HOT SELL mp3 player with lower price 1.Support MP3,WMA ,AMV.2.USB is really 2.0 high speed 3.Can be used card reader , mobile flash disk , data storage 4.Color apition: black.bue,pink ,white,etc 5.Built-in lithium batteries power supply to play 3-4 hours "High-speed 2.0 ...