Swimming exercises your whole body and is easy on your joints. It is popular but can be painstaking and boring laps after laps. Traditional earphones need to be plugged into ears deeply and firmly to make sure ear is sealed especially with intensive body movement. The painful experience and prone to ear infection have greatly hampered the popularity of earphones amongst swimmers. Powered by bone conduction technology, Xtrainerz swimming MP3 headphones are ears-free and eliminate these problems. Let\\\'s make swimming fun. Bone conduction technology delivers music through your cheekbones, because Xtrainerz are ears free no earphone induced swimmer\\\'s ear. 8-hour battery life for music, audio-books and podcasts. Complete wraparound titanium design provides a flexible fit for unnoticeable all-day comfort and stability. Fully waterproof (IP68 rated) submersible up to 2 Meters for 2 Hours, every single Xtrainerz tested on assembly line at 5 atmosphere pressure. PremiumPitch 2.0+ delivers wide dynamic stereo sound and louder volume. Re-angled transducers with significantly reduced vibration and enhanced sound quality. Audrey Says™ voice prompts guide users through power and play. Compatible with swim goggle, cap and earplugs. 4GB Memory can store up to 1000 songs in multiple formats, WMA, AAC, MPS, MAV and FLAC. Download songs and audio from any PC or MAC with a USB port. Hassle-free 2 year warranty included.