Judging by what the sale says, this is most likely a generic copy and the seller is muddying the waters by calling it OEM.
OEM is short for "Original Equipment Manufacturer". It means one firm manufactures products and(or) accessories for another firm according to it's demands. This business model has been Operated several years internationally, and it is proved to be effective. Many international manufacturing companies also use this model, such as Dell, Intel and so on.
This is an OEM version player (Original Equipment Manufacturer), and is NOT compatible with I-Tunes, but is much simpler to use as all you do is drag and drop! it doesnt even require any software and can even act as a portable hard drive as it can store any file type!
So the OEM version is highly emulational, not original, and from the OEM factories.
Q:- Is the an Orginal Apple Ipod Shuffle?
A:- This is a OEM Apple Ipod Shuffle (exact same)which is easier to use and HALF of the retail price
Q:- Differences beween Apple iPod and Apple OEM iPod
A:- No difference at all. They are the EXACT same but without Apple logos and you can use MP3, WMA, WAV - iTunes not needed