The TCL 43" Class 4K (2160P) Roku Smart LED TV (43S423) delivers stunning Ultra HD picture quality with four times the resolution of Full HD for enhanced clarity and detail, as well as the most streaming channels of any 4K TV. To make the most of all this content, High Dynamic Range (HDR) technology delivers bright and accurate colors for a lifelike viewing experience. In addition, your favorite HD shows, movies, and sporting events are upscaled to near Ultra HD resolution with 4K Upscaling.