Sony WF-1000XM4 True Wireless Replacement Earbud Black or Silver Replacement

Pls let us know what version your existing earbud is. we will send you the same version replacement.

Can single ear firmware versions of different firmware match?
（1） The latest firmware of 2.0.0 can only match the single ear firmware of 2.0.0.
（2） Lower versions below 2.0.0, such as 1.6.1/1.4.2/1.3.3, can be paired with different firmware versions for single ear use. Playing music and making phone calls are fine, but firmware upgrades and voice updates are not possible. Everything else makes no difference. (You can choose to turn off voice on the app)
（3） A single ear with the same firmware version can simultaneously upgrade firmware and update language.

Item Description

Replacement. A Grade. Very light signs of use. Choose your missing piece 1 earbud from the drop down menu, 

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