It seems that this design just can't be supplemented by a single one, so it can only be supplemented by a new one. I should have told you when I bought it that I could call 3 15 to protect my rights, but it should be useless.

BOSE brand-new true wireless noise reduction headphones; Small and stylish design and portable storage box, which is convenient for you to carry in your daily travel; Advanced shark fin silicone earmuffs are more comfortable and firm to wear.

Dynamic balance design ensures consistent sound quality performance.

1 1 The noise reduction level refines the noise reduction effect and truly achieves "quietness and music can shine."

Three-speed fast noise reduction adjustment, easy to switch scenes.

Capacitive touch makes the operation more intuitive and convenient.

Wireless charging charging box supports wireless charging.

Call the voice assistant to support Siri and so on.

Bluetooth 5. 1 data transmission is more stable.

Other aspects:

The difference between Baise sharks and small sharks is that Baise sharks have noise reduction function, while Baise small sharks have no noise reduction function. Bose Shark battery lasts about 6 hours, and supports Qi-certified UsB-C charging cable or wireless charging pad. Bose dynamic sound quality equalization technology can automatically enhance bass and treble, presenting clear audio and deep and rich bass effect.