Safe and stable fit: We optimized the weight distribution of the earphones to ensure a safe and stable fit. Now you can enjoy your workout without worrying about the earphones falling off or shaking, allowing you to focus on the activity.Immersive HIFI sound quality: Equipped with a 14.8MM large speaker and a flagship super-linear speaker vibrator, our earphones provide high-fidelity sound quality. The speaker covers low, mid and high frequencies, providing a fully immersive audio experience.5. HIFI sound quality 14.8MM large speaker, flagship super-linear speaker vibrator covers low, mid and high frequencies, and is fully enhanced.Stable connection and clear call: The new generation of Bluetooth chips ensures fast and stable connection in just a few seconds, providing a seamless listening experience. Intelligent algorithms identify and filter ambient sounds, making calls clearer and more focused.4. More stable connection and clearer calls. The new generation of Bluetooth chips connects in seconds, making listening to songs and calls more stable. The algorithm intelligently identifies and filters ambient sounds, and personnel affairs are clearer.