Sometimes bigger is really better, especially when it comes to sound. That’s why we took a puny pair of earbuds, put them in Fred’s highly technical Way Big machine, and created 500XL. It’s 500 times the size of the original! How great will these look on your desktop alongside your mp3 player or PC? 500XL includes a built-in amp and 3-way power: USB port, 3 AAA batteries (not included), or AC adapter (not included).