Bone Conduction Technique: The wireless bluetooth headset adopts the new open-ear bone conduction technology, which allows you to hear the sound of the surrounding environment while wearing the headset to listen to music, which ensures the safety and avoids the damage caused by the in-ear headset to the hearing. IPX8 Professional Waterproof: Swimming headphones can be immersed in water up to 2 meters deep for up to 2 hours. You can also enjoy clear, precise sound underwater. MP3 mode allows you to enjoy your favorite audio while swimming, running, biking, and training without having to connect to Bluetooth. MP3 & Bluetooth Dual Mode: no need to connect Bluetooth MP3 mode, so that you can enjoy underwater music, built-in 32GB memory, can store up to 8000 songs or audio books, you can also choose Bluetooth mode to connect to any device, 5.3 the latest Bluetooth technology connection faster and more stable. Comfortable Open-Ear: High-quality materials, weight is only 30 g