Experience next level of visual entertainment with TCL 55 S-Series smart TV. Its 4K UHD screen resolution, 6.5ms response time and a 60Hz refresh rate guarantee extremely smooth, clear and realistic picture. Three HDMI 1.4a inputs let you watch high-quality content from different sources and dual-band Wi-Fi allows you to wirelessly stream various content." | TCL 55" S4 4K UHD HDR LED Roku OS Smart TV (55S450R-CA)