1. [Stable wireless connection]-Bluetooth 5.1 provides faster, more stable and wider compatibility with iOS and Android smart phones, tablets, laptops and MP3 players. 2. [HD & Stereo]-Built-in noise more→reduction microphone and HiFi bass, enjoy wireless mobile phone calls and music while driving, running and running. 3. [Neckband & Anti-sweat]-The neckband is designed to provide higher flexibility, portability and durability during exercise. Doesn't fall off and painless after long-term use. IPX is waterproof, perfect for exercise. 4. [Battery life]. Equipped with a large 120 mAh battery, it can be used for up to 6 hours of continuous talk, 8 hours of music, 120 hours of standby time, and a