Amazon.com: Friencity 2023 Upgraded Wireless Headphones Earbuds for TV Watching, Bluetooth V5.0 Transmitter (Optical AUX RCA) Set w/Neckband Earphones for Seniors, Plug & Play, Volume Control, No Lip-Sync Delay : Electronics
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How do true wireless headphones work? How do they sync with each other and the phone? - Quora