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This TV native support is 4K - UHD - 2160p resolution, also it supports regular 1080p FHD. David M. - Insignia Support
Sorry, there was a problem. Please try again later.You will not need any additional items to use 4K if you already have an HDMI cable. You will ;however, be limited by hardware you own if it supports 4k resolution or not. The hardware that does not meet these requirements will instead use the maximum resolution the device can access.
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