100% Fully Submersible, Waterproof and Sweatproof 4GB MP3 Player Headphones * Ideal for swimmers, cyclists, runners, triathletes, walkers, hikers, water and snow sports, and any kind of workout * Noise-isolating in-ear style cushions with ergonomic cord free design * Rechargeable lithium ion battery provides up to 10 hours of play time * Includes 7 pairs of soft silicone tips for water and land use, USB 2.0 Mini Cable, User Manual and 1 year limited warranty