Hi-Fi Deep Bass Stereo Sound and Clear Calls: Large speaker drivers deliver powerful bass, soft mids, and clear highs, vividly reproducing music, powering your workouts, freeing you from the constraints of cables, providing an immersive music experience, and giving you a feeling of expanded space. The noise-canceling speakers are equipped with high-quality ENC noise-canceling microphones that passively remove 80% of background noise, making it easier to hear the other party and their voice, and allowing for clear conversations with minimal background noise. Cutting-Edge Bluetooth 5.4 Technology and Easy Pairing: STECEi HD65 wireless earphones adopt advanced Bluetooth 5.4 chip technology, supporting HFP A2DP HSP AVRCP, providing instant pairing and stable, uninterrupted transmission, and a stable connection distance of up to 33 feet. Compared to Bluetooth 5.0, Bluetooth 5.3 significantly improves data transfer speeds, and greatly improves signal stability and efficiency even in complex environments. This ensures a stable, ultra-low latency Bluetooth connection for the headphones, reduces battery consumption, and ensures compatibility with a wide range of applications. The moment you open the box, the earphones instantly and easily pair with the previously connected device, eliminating the hassle of manual pairing and long connection times. Sensitive Button Controls and Wide Compatibility: Compared to the complex operation buttons of commercially available headphones, Bluetooth earphones with button controls allow you to easily control music playback/pause, fast forward/rewind, answer/reject calls, SIRI (voice prompts), and more with a light press. Ergonomic Sports Design and IPX7 Waterproof: The ear hooks of these headphone Bluetooth sports are made of innovative TPU (elastic) material, which has scanned the ear shapes of thousands of people and used cutting-edge algorithms to analyze and simulate the design results. The ear hook wireless earphones not only solve the problem of Bluetooth earphones falling out during running, but also provide a comfortable and hypoallergenic fit.