QQ-Tech waterproof mp3 players come with crystal clear sound quality, and are good for most sports like swimming, jogging, and bicycle riding etc. Try it, you will get everything you want at this super good price. Scientists say that music can make man easy during sport and can increase the sport effect by 20%. Swimming can be boring, but now, you can carry your favorite music along with you, spa, surfing, skiing, all water activities will have more fun now.