What HDMI cable do I need to connect my Roku Ultra to my TV?
For HD TVs, use a High Speed HDMI Cable (not included). For 4K/HDR TVs, use a Premium High Speed HDMI Cable (not included) and connect to an HDMI port that supports HDCP 2.2. You can visit go.roku.com/hdcp for help determining which port supports HDCP 2.2.
From the official Roku Battery Ultra Remote manual, page 2
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