1.Portable cd boombox 2.AM/FM stereo radio 3.USB slot,earphone jack 4.SD/ ... , Stop,Skip, Repeat(one, all) functions4. 20-track programmable memory5. AM/FM/FM stereo radio tuning.6. USB jack.(optional)7 ... versions:Option 1: CD+AM/FM onlyOption 2: CD+MP3+ AM/FMOption 3:CD+MP3+USB+SD+ AM/FMRemote control is optional for ... CD BOOMBOX, CD BOOMBOX with USB/SD SLOT/ MP3/MP4/AM/FM