【IP68 Waterproof Design】Specially engineered for swimming, the headphones feature IP68 waterproof rating, ensuring full protection during aquatic activities 【Open-Ear Bone Conduction Technology】Utilizing advanced bone conduction technology, these headphones deliver clear audio without blocking your ears, enhancing situational awareness 【Dual Audio Sources】Equipped with Bluetooth-compatible connectivity and 32GB internal storage, allowing for versatile listening options both in and out of the water 【Comfortable and Secure Fit】The silicone ear hooks provide a comfortable and stable fit, ideal for extended wear during swimming or other activities 【Magnetic Charging】Convenient magnetic charging ensures a secure connection and easy power replenishment Specifications: Bluetooth-compatible solution: JIELI 7018M V5.3 Connection distance: ≈10 meters MP3 memory: 32GB Supported formats: MP3, WMA, APE, FLAC, M4A, WAV Battery capacity: 180mAh Play time: ≈7 hours (80% volume) Talk time: ≈7 hours (80% volume) MP3 time: ≈5 hours (80% volume) Standby time: 300 hours Charging time: 2 hours Product weight: 34 grams Product material: ABS+PC Product size: 135*109*46mm Certification: CE/ROHS/FCC/MSDS