The 4-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 Roku 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 Roku interface allows seamless access to over 500,000 streaming movies and TV episodes, your cable box, Blu-ray player, gaming console, and other devices without flipping through inputs or complicated menus. Striking 4K UHD Picture Performance with High Dynamic Range Ultra HD resolution with HDR offers exceptional clarity and detail. 4K Creative Pro Upscaling View your favorite HD content in near 4K quality. Simple, Intuitive Interface Seamless access to over 150,000 streaming movies & TV episodes. 802.11ac Dual-band WiFi & Ethernet Port: Fast and easy access to your favorite content. Easy Voice Control Voice control with Roku mobile app and compatible third-party voice assistant devices.
The 4-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 Roku 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 Roku interface allows seamless access to over 500,000 streaming movies and TV episodes, your cable box, Blu-ray player, gaming console, and other devices without flipping through inputs or complicated menus. Striking 4K UHD Picture Performance with High Dynamic Range Ultra HD resolution with HDR offers exceptional clarity and detail. 4K Creative Pro Upscaling View your favorite HD content in near 4K quality. Simple, Intuitive Interface Seamless access to over 150,000 streaming movies & TV episodes. 802.11ac Dual-band WiFi & Ethernet Port: Fast and easy access to your favorite content. Easy Voice Control Voice control with Roku mobile app and compatible third-party voice assistant devices.
in 2 offers
The lowest price for TCL 55S421 55 Inch Class 4-Series 4K UHD HDR Roku Smart TV right now is $794.00 at Ubuy Australia, compared across 2 retailers.
The all-time low was $435.59 on 19 Feb 2026 — today's price is 82% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 18 June 2026.
TCL 55S421 55 Inch Class 4-Series 4K UHD HDR Roku Smart TV
The 4-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 Roku 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 Roku interface allows seamless access to over 500,000 streaming movies and TV episodes, your cable box, Blu-ray player, gaming console, and other devices without flipping through inputs or complicated menus. Striking 4K UHD Picture Performance with High Dynamic Range Ultra HD resolution with HDR offers exceptional clarity and detail. 4K Creative Pro Upscaling View your favorite HD content in near 4K quality. Simple, Intuitive Interface Seamless access to over 150,000 streaming movies & TV episodes. 802.11ac Dual-band WiFi & Ethernet Port: Fast and easy access to your favorite content. Easy Voice Control Voice control with Roku mobile app and compatible third-party voice assistant devices.
The 4-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 Roku 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 Roku interface allows seamless access to over 500,000 streaming movies and TV episodes, your cable box, Blu-ray player, gaming console, and other devices without flipping through inputs or complicated menus. Striking 4K UHD Picture Performance with High Dynamic Range Ultra HD resolution with HDR offers exceptional clarity and detail. 4K Creative Pro Upscaling View your favorite HD content in near 4K quality. Simple, Intuitive Interface Seamless access to over 150,000 streaming movies & TV episodes. 802.11ac Dual-band WiFi & Ethernet Port: Fast and easy access to your favorite content. Easy Voice Control Voice control with Roku mobile app and compatible third-party voice assistant devices.
Last updated at 18/06/2026 02:01:37
TCL 55S421 55 inch Class 4-Series 4K UHD HDR Roku Smart TV
Delivery between 22–26 June $15.52
55S421 55 inch Class 4-Series 4K UHD HDR Roku Smart TV
Delivery between 24–27 June $29
TCL 55S421 55 inch Class 4-Series 4K UHD HDR Roku Smart TV
Delivery between 22–26 June $15.52
55S421 55 inch Class 4-Series 4K UHD HDR Roku Smart TV
Delivery between 24–27 June $29
