Upgraded Bone Conduction HeadphonesThe bone conduction Headphones adopt the latest Innovative bone conduction technology, and deliver premium audio through the cheekbones, resulting in high sound fidelity and clarity. The safer open-ear headphones increased situational awareness and provided a unique, double-layered listening experience. It allows you to hear joggers or cyclists approaching behind you and are able to remain in touch with your colleagues even while listening to your tunes. Bluetooth 5.3 Technology & Long Battery LifeOur bone conduction headphones Bluetooth, Use the latest Bluetooth 5.3 chip. It supports stable and multiple connections, so you can easily switch devices as you need. The transmission speed is faster and more stable. With a 230mAh big battery, it can be fully charged within 1.5 hours. And lasts for 150 hours of super-long standby, or 8-10 hrs of uninterrupted voice calls/music playback with one single charge. IPX7 Water-ResistantBluet