Measuring a wallet-worthy 4 inches tall, 3 inches wide, and 1 inch thick, the Mophie Knox is a hinged aluminum clamshell case for 2nd-gen Nanos that doubles as a money clip and credit card case. While the Mophie Knox's construction is top-notch, something feels inherently wrong about transforming your super-skinny iPod Nano into a bulky wallet. That said, the baggy-pant-wearing among you who have been searching for a high-style musical wallet will not be disappointed.
The Mophie Knox is full of little design details such as a magnetic latch system and a headphone cable pass-through hole. Keep in mind, however, that storing your iPod alongside a wad of cash and personal identification might not be a bright idea for people who live in rough neighborhoods or are prone to misplacing their MP3 players. Unless you've been looking high and low for a means to turn your wallet into a portable jukebox, we recommend buying a more basic case for your Nano that doesn't require you to flaunt your Benjamins each time you listen to music.