This waterproof MP3 player attaches to your swimming goggles, allowing you to listen to music while you swim. The player's short headphone cables do not interfere with your stroke as you swim. The player supports both MP3 and WMA digital audio formats, and its built-in 1 GB memory can hold up to 300 songs, enough for an entire week of swim workouts. The player has volume, track forward/backward, and play/pause controls. The included armband and earbud extension cable allows use while running or walking. Songs are loaded from your computer running Windows XP, Vista, or a Mac using the included USB cable. Its battery provides up to six hours of listening before requiring a recharge via USB. 2 1/2" L x 1 1/2" W x 1/2" D. (3/4 oz.)