1. Ergonomic design, comfortable and stable wearing, more comfortable in sports 2. With the function of switching between the main and secondary ears, the left and right ears can be used independently and switch at will 3. Bluetooth 5.0 chip, approaching “0” delay, faster and more stable transmission 4. Take it out immediately, without tedious operation 5. Fingerprint touch control, light touch control, more convenient operation 6.IPX7 class deep waterproof, no fear of downpour 7. Double-ear