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Not In-ear Design: Headphones that don't need to be plugged into your ears close to the ear bone, the sound wave is directly transmitted to the sound perception system, enjoying high-quality music without damaging the ear. High Sound Quality: The large dynamic diaphragm is used for directional audio transmission without loss, creating a realistic surround sound field.It can be used for 10 hours on a single charge, you can feel at ease in the world of music. Semi-closed Tone: Take into account the external voice. Bone conduction open tone, while listening to songs can pay attention to the outside sound, maintain vigilance around, and improve the safety of outdoor sport. IPX5 Waterproof: The multi-step process is strictly designed to prevent rainwater from entering the inside of the earphone and damage the components without fear of rain and sweat，so you can enjoy the sports without Worrying about your sweat.