BLUETOOTH WIRELESS CONNECTION: Bluetooth MP3 player headset uses Bluetooth 5.0 chip, 33 feet stable connection, stronger signal, more stable, longer working time. BUILT-IN 32GB MEMORY: Swimming Bluetooth headset comes with 32GB storage, can store about 9000 songs, supports multiple audio formats, no longer feel bored when swimming, surfing or diving, enjoy music anytime, anywhere. FULL DIVING: MP3 player and earphones are waterproof and durable (IP68) design, can swim in 20 meters underwater; designed for swimming, running, fitness, sports and other sports STEEL SHEET WITH CONTACT PROTECTION: Avoid exposure of the metal contacts on the earphones, prevent the metal contacts from being corroded by sweat or other liquids, isolate the direct contact between the body and the metal contacts, and effectively protect the metal contacts to extend the service life of the earphones. HIGH-QUALITY SOUND: Innovative bone conduction speaker, using the internal cavity of the product structure to reduce sound leakage, built-in 300mA battery, charging for 1.5 hours, can be used for 6-8 hours, standby time is about 180 days.