This waterproof 4GB MP3 player is an ideal companion for swimming your morning laps, floating aimlessly in the backyard pool, tuning out your friends at the beach and for when you're sweating profusely and worried about electrocuting yourself with your own perspiration. The battery life reaches up to 20 hours while playing and is a simple USB charging system, meaning anywhere you can hijack a computer you can charge your beloved swimming buddy. This player is a great way to stay focused and motivated while you train, simply attach the MP3 to your goggle strap or waist band and switch on your favourite pump-up music, audio book or motivational mantra.