A:Answer Both our 4 and 5-Series Roku TVs include a built-in Roku operating system, 4K UHD, and HDR Support. The 5-Series features Dolby Vision support, wide color gamut, auto-game mode, an edge-to-edge glass display, QLED technology, CCZ, eARC, and more! A cable box is not required to use the TV. In order to use the smart features of this TCL Roku TV, you would need to complete the guided setup. This includes connecting to the Internet via WiFi, creating a Roku account (completely free), and activating the TV (completely free). Hope this helps! Thank you, TCL Customer Support