Before the Apple iPod, Sony envisioned portable music players when they first introduced the Walkman in 1979. A lot has happened since then, and the portable music player market is a congested one, minus the bulky cassettes or CDs. Looking at getting ahead of the game, Sony Europe is introducing these Walkman WH Series headphones, combining a good quality headphone and digital music storage device. The headphone's storage capacity ranges from 4GB to 16GB, while the battery can last for roughly 20-hours of playback on full charge, and one-hour playback can be achieved from a mere three-minute express charge. Although designed as a standalone wireless device, you can plug these headphones into your favorite gadgets as well.