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Hi TVCOMPATIBLEWITHTABLO, Thanks for the question. The X77L 4K LED TV is a Google TV that is running an Android operating system. As for your DVR, as long as it connects via HDMI then the device should work properly. Make sure to check your device's manual for clarification. Experience all your favorite content in lifelike 4K HDR picture quality, powered by the 4K Processor X1™. All your HD content is upscaled to near-4K resolution resulting in sharp details and real-world colors. Google TV™ with Google assistant™ makes it easy to find your favorite movies and shows from all the top streaming apps. Regards -Craig
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