TCL 65" LED 4K TV Roku Smart. TCL's 6-Series combines stunning 4K HDR picture performance and the award-winning Roku TV smart platform in a bold, brushed metal design for a superior TV experience. Dolby Vision delivers greater brightness and contrast, as well as a fuller palette of rich colors. TCL's Contrast Control Zone technology individually optimizes the image across up to 160 zones to yield striking contrast between light and dark areas. The 6-Series models’ iPQ Engine™ provides precise color replication while HDR Pro Gamma significantly improves HDR performance in any setting. Powerful performance is complemented by the award-winning Roku OS smart TV platform.