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The LG 55” Class UA77 Series LED AI 4K UHD Smart webOS TV (2025), Model # 55UA7700PUB, features three HDMI inputs that carry audio and video. HDMI 2 is an HDMI eARC port, which is a bi-directional feature that allows both audio and video to be transmitted over the HDMI cable. This means that HDMI eARC can send audio from the TV to a soundbar or AV receiver, but it can also send video from the AV receiver to the TV. This dual functionality simplifies the setup and reduces the number of cables needed in your AV system. The TV also features an Optical Digital Audio Output that can be connected to an Optical Digital Audio Input on an AV receiver, soundbar or a Home Theater System using an optical cable...^Ivan. +5
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