The S-Series 4K TCL Roku TV 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. 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. The simple, intuitive interface allows seamless access to over 450,000 streaming movies and TV episodes, your cable box, Blu-ray player, gaming console, and other devices without flipping through inputs or complicated menus. 
TCL 55" Class 4K (2160P) Roku Smart LED TV (55S405):

Key Features: 

• Striking 4K UHD picture performance (3840x2160) with high dynamic range (HDR) technology 
• Stream 450,000 movies & TV episodes 
• 4K Creative Pro upscaling engine 
• 120Hz CMI effective refresh rate 
• Simple, intuitive interface 
• Easy-to-use remote 
• Over 4,500 streaming channels 
• Search across top streaming channels with Roku Search 
• Free Roku remote app with Voice Search Cast photos, videos, and music from your smartphone to the TV