AquaTunes Sports Belt allows you to swim, sail or surf while you listen to your favorite music! AquaTunes has been America's favorite way to waterproof music for over 15 years. It is the original watersport belt designed for the lap swimmer, windsurfer, snorkeler or any other watersports enthusiast who enjoys listening to music in the water. It's great for books on tape too! Originally developed to diminish the monotony and enhance the enjoyment of lap swimming, AquaTunes is compatible with most personal stereos. It is supplied with our patented earplug speaker system which secures the speaker in the ear and keeps water out. Use with your favorite personal stereo to listen to , books, lectures, workout tapes or music. Clear PVC for better visibility and operation of controls. Exclusive clamp design provides watertight seal. Comfortable webbing belt with corrosion proof, impact resistant molded buckles. Provides universal fit and is fully adjustable up to 40". Belt extensions are also available. Full 30 day warranty. Each AquaTunes includes: waterproof housing, belt, clamp, waterproof earplug speaker system. Unlike other watersport belts, only AquaTunes offers the versatility of allowing you to take your favorite stereo CD, cassette or MP3 player into the water so you can listen to music or even "read" a book on tape by your favorite author. Nothing reduces boredom and lap swimming blues like the AquaTunes. By making workouts more enjoyable, you'll swim longer and exercise more, resulting in improved health and fitness. And it works great at the beach too... now you can swim, sail or surf to your favorite music!