Sony has reportedly filed a patent for a pair of truly wireless (or TWS) earphones. However, successors to the well-received WF-1000XM3s they are most likely not: they have a more original design that incorporates a large attachment on which physical controls are found.
Sony’s most recent TWS earphones were designed with effective retention in the ear in mind.
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https://www.notebookcheck.net/Sony-s-strange-new-TWS-earphone-design-may-be-intended-to-cater-to-helmet-wearers.463469.0.html
