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Yes, all four are 2.1.
Sorry, there was a problem. Please try again later.Hi there. Thank you for sharing your inquiry with us regarding the connectivity of your LG OLED77B5PUA TV. We understand your question about the HDMI ports, and it is a great question, especially for those who enjoy high-performance gaming and media. We can confirm that your OLED77B5PUA TV is equipped with a total of four HDMI inputs, and all four of these ports fully support the key HDMI 2.1 features. Here is the simple and direct specification for the connectivity on your unit: HDMI Input: 4ea (supports 4K 120Hz, eARC, VRR, ALLM, QMS (4 port)) This is beneficial because it means you can connect multiple next-gen devices, such as gaming consoles and PCs, and experience advanced features like 4K resolution at a 120Hz refresh rate, Variable Refresh Rate (VRR), and Auto Low Latency Mode (ALLM) across all four ports. https://www.bestbuy.com/product/lg-77-class-b5-series-oled-ai-4k-uhd-smart-webos-tv-2025/JJ8VPZTKZW Your feedback is important, and we'd like to assist you further. If you have any further questions about how to best set up your devices or other features, please send us a private message on Social Media @LGUSSupport, and our team will be more than happy to assist you. —Renzo
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