This concept MP3 player design by Hugo Cailleton looks sleek and sporty at the same time and offers features such as an FM radio, microphone, and large display for easy playlist navigation. One of the more useful features would be the inclusion of a retractable USB plug, ensuring that you won’t have to dig around your bag for the necessary cable when you want to transfer songs into it. Check it out a few more times, and the polished pebble design might just grow on you.