The Oakley ROKR can stream music wirelessly from your iPod and plays it through your sunglasses. Built-in speakers give a crystal clear sound. A unique pair of sunglasses, still available but with a slighty different design than the originals worn by Vin Diesel.
These cool multifunctional glasses are not available anymore, except sometimes on eBay.
Reference: Oakley ROKR - Polished Black, Grey Lens (code 001-0001)