The Sony WF-1000XM4 Truly Wireless are the next generation of the Sony WF-1000XM3 Truly Wireless. They come with many of the same features as their predecessor
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Sony WF-1000XM4 Truly Wireless Review
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The tips are made from memory foam that responds to your body heat and expands to fit your unique ear-shape and create its seal. The result is a fuller audio experience as well as a fit that won't move while you move about. The tips are designed to fit in the earphone's case without interfering with charging. They also offer TechDefender protection an acoustically transparent filter to protect your earphones from moisture and debris while offering passive noise-reduction.
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