Features: [IPX8 Waterproof] The headphones can stay submerged under water without sustaining damage, perfect for swimming, running, surfing and more. [Long Working Time] 95mAh rechargeable battery offers up to 6 hours of music playing time. You can charge it with USB cable via Micro USB port. [BT Connection] Wireless BT4.0 technology ensures transmitting strong signal in high speed. Stereo music makes you immerse in your music world. [Hands-free Multi-point] Built-in microphone enables hands-free calls to set free your hands when doing sports. It also supports multi-point connection. [Suitable for Outdoor Sports] 360 rotatable ear-hooks guarantee stable and comfortable wearing for swimming, running, skating and other outdoor sports.