The Oakley Thump Pro 1G MP3 Sunglasses make grueling training sessions bearable and awesome days running or biking even better. The Thump Pro 1-Gigabyte Sunglasses hold 240 of your favorite songs, and you wont have to deal with dangling wires. Even with the sound system integrated into the frame, the Thump Pro weighs less than an empty CD jewel case. Move the speakers nearer to or farther from your ears to get your ideal balance of music and environmental noises, so you can hear traffic or your coach yelling, or you can tune it all out. Nose and temple grips hold these glasses on your face, even as you sweat through your bike ride. Like all Oakley sunglasses, these are impact-resistant, block all harmful light, and wrap around to provide a protected peripheral view. The Thump Pro 1G plays up to six hours on one battery charge and is compatible with Windows Media Player, WinAMP, CDs transferred to iTunes, and others. A USB cable comes included.