Hi everyone, I really need your help.

I sold my tablet, but the client reject it, and when come back to me, I realice that he instaled
another operation system called "cyanogenmod" and this program is Awfull really , I can't even watch youtube.

So I want to reinstall the Android in my tablet.

Somebody can help me, please I need the android's version for do it.

Thanks in advance.