1.Portable USB boombox with CD/MP3 player 2.AM/FM stereo radio 3.USB slot,earphone jack 4.SD ... /MP3/WMA.3.Play/Pause, Stop,Skip, Repeat(one, all) functions4. 20-track programmable memory5. AM/FM/FM stereo radio ... versions:Option 1: CD+AM/FM onlyOption 2: CD+MP3+ AM/FMOption 3:CD+MP3+USB+SD+ AM/FMRemote control ... (optional), power cable USB boombox with AM/FM radio,CD/MP3 player,SD/MMC memory card socket