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Hello there, thank you for reaching out! Apart from the Optical Audio output, the 65UT7000PUA also provides HDMI Audio Return Channel (eARC) through HDMI 2, which allows you to send audio from the TV to external audio devices that support eARC. Additionally, it has Simultaneous Audio Output, which enables you to connect and output sound to both the TV's built-in speakers and external audio equipment at the same time. As for the USB IN, this port allows you to connect external devices like a USB drive for media playback (videos, music, and photos). It can also be used for firmware updates for your TV. https://www.bestbuy.com/site/lg-65-class-ut70-series-led-4k-uhd-smart-webos-tv-2024/6593578.p?skuId=6593578 If you need more assistance, feel free to contact us via @LGUSSupport on social media. —Renzo
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