Apple iPod nano 16GB Silver (4th Generation) - MB903LL/A
The only thing I don't like is changing the charging for this version of iPod Nano. Apple dropped the 12 volt charging for this version of iPod nano, and left only the 5 volts. That means; if you have a car adapter that used to work with your old iPod nano, most likely, it will not work with this version of the iPod nano (USB charging always works since it is 5 volts). This is the same problem with iPhone G3 and iTouch G2 and now with iPod nano G4!