The black Sony Sports Walkman NW-WS413 4GB Digital Music Player is designed for active users. This headset features a unique ergonomic design that fits comfortably around your head and frees you from being tethered to another media player. It's equipped with 4GB of internal flash memory and supports MP3, WMA, AAC-LC, and LPCM audio files, so you'll have plenty of music to score your workout. To accommodate all active users, the NW-WS413 was designed to be water and dustproof, and to operate in extreme temperatures. Supporting its waterproof design, the NW-WS413 comes with a set of swimming earbuds you can use when you're in the pool.
The Walkman's built-in rechargeable battery provides up to 12 hours of continuous audio playback on only 90 minutes of charge. Plus, it supports drag-and-drop media file transfers from compatible Mac or Windows computers. A USB cable for data transfer and charging is included.