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Regarding the treatment of one headset with no sound, it is because it is not paired successfully, just wait for reboot and wait for the two headphones to light up the blue light and then re-pairing can solve the problem.
Professional tuner thousands of times on the headset repeated debugging, whether you are playing games, listening to songs, watching the show, can give you excellent listening enjoyment, double moving coil low frequency sound, double moving iron high frequency sound, bass thick and powerful, treble clear and bright

*Equipped with the call noise cancellation function that high-end headphones have, intelligent personalised noise reduction and sound performance for your ears, allowing you to enjoy deep, immersive sound, so that you can communicate better when using the headset to talk, avoiding the poor call effect brought about by the loud volume.

*Earbuds provide up to 5 hours of normal use (at 50% volume) on a single charge, with fast-charging technology that allows up to 1.5 hours of listening in 10 minutes of charging, and up to 22 hours of continuous use from the headset + charging compartment.

*Wireless earbuds offer faster, more stable Bluetooth 5.3 connectivity, this latest generation of Bluetooth technology provides a strong, consistent connection as long as it is within 30 feet of the paired device.

* The construction of the headset was studied in thousands of ear canals before being designed to fit most people's ears. This wireless Bluetooth headset is compact and lightweight, with a single earbud weighing only 3.3g, making it easier to carry.

DSP anti-interference 5.3 chip, fearless of any environment, high-speed transmission of low-power, stable and non-continuous, no lag, quietly enjoy good music, AAC + SBC audio decoding to achieve a sense of senseless delay, to achieve synchronisation of sound and picture