SONR Music, Open-Ear Underwater Music Player for Swimmers, Swimming Headphones, Waterproof Bone Conduction MP3 Player, Underwater Swimming Headphones with Bluetooth (Azure Blue)

【Listen Underwater with Confidence】 100% waterproof bone conduction MP3 player designed for swimmers, triathletes, and open-water training. 【No Earbuds, No Limits】Bone conduction technology delivers clear, balanced sound through your cheekbones. Perfect for pool or ocean swimming. 【Easy to Use】One-button control and fast file upload from any computer. 16GB internal memory stores up to 2,500-3,000 songs (MP3, MP2, MP4, FLAC, M4A, AAC). 【Long Battery Life】Up to 4 hours of continuous underwater playback per charge. Up to 10 days of standby time when not in active use. Up to 8 hours of total mixed-use battery for land + swim sessions. Bluetooth mode works on land for training. 【Waterproof & Comfortable Fit】5 ATM waterproof bone conduction MP3 player - safe for swimming and training in pool or open water. Sleek 35 g design fits securely and comfortably on your head without earbuds. 【Important Before Use】Fully charge the device before first use without unplugging it. Recharges in about 1.5 hours via magnetic USB cable. If unused for a long time, recharge to maintain battery performance.