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TCL 55 4k UHD HDR Smart Roku TV – 55s21

TCL 55 4k UHD HDR Smart Roku TV - 55s21
Written by Jules Whitman

Television technology has come a long way in delivering high-quality, personalized content, and the TCL 55 4k UHD HDR Smart Roku TV - 55s21 is no exception. This is one TV that meets the viewers' expectations.

Gone are the days when you had to search for the remote control between sofa cushions or get up from your comfortable spot to adjust the volume. With this TV, you can now control your TV using your voice.

Not only that, but you can also transform your smartphone into a full Roku remote with voice control.

This means you can easily navigate through the TV's menu, change channels, adjust the volume, and search for your favorite shows and movies, all from the comfort of your phone.

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TCL 55 4k UHD HDR Smart Roku TV - 55s21

TCL 55 4k UHD HDR Smart Roku TV - 55s21

Regarding television technology, viewers expect a high-quality and personalized experience.

The HDR technology in the Roku TV delivers bright and accurate colors that provide a realistic viewing experience.

The Advanced Digital Tuner pairs with an HDTV antenna, allowing viewers to watch dozens of local broadcast channels without cable. This provides cost savings and greater accessibility to free-to-air content.

This TV also offers a simple, personalized home screen that provides seamless access to thousands of premium content, such as movies and TV shows.

The Roku mobile app makes browsing or adding new channels simply by transforming your smartphone into a Roku remote with voice control.

But that's not all. The TCL 55 4k UHD HDR smart Roku TV - 55s21 is also compatible with Alexa, Google Assistant, and Apple HomeKit, giving you even more options to control your TV with your voice.

You can ask your voice assistant to search for a specific movie or TV show, play music, or even turn on/off the TV.

For users who require closed captions or parental controls, the TV offers features to accommodate these needs.

The multilingual on-screen display is adjustable to different languages, and the accessible menu system and sleep timer add convenience to the user experience.

The Live TV Pause feature, which allows users to pause live TV from an antenna for up to 30 minutes, adds further flexibility to the viewing experience.


  • Panel Resolution: 3840 x 2160
  • Resolution: UHD
  • Display colors: 1.07 billion
  • HDR, HDR10, HLG
  • HDMI port: 4
  • USB 2.0: 1
  • Wireless connection
  • RF Antenna Input: 1
  • Headphone jack: 1
  • Screen size: 55 inches
  • Refresh rate: 60Hz
  • Audio output power: 8W
  • Sleep timer: Yes
  • Voice control

Display & Screen Size

The TCL 55 4k UHD HDR Smart Roku TV - 55s21 has a refresh rate of 60Hz, which means that the picture is refreshed 60 times per second, providing a smooth and seamless experience

Also, the TV has a panel resolution of 3840 x 2160, also known as Ultra High Definition (UHD).

This means that you can enjoy an unparalleled level of detail, with every detail captured in stunning clarity.

In addition, the TV supports the High Dynamic Range (HDR) format, which delivers brighter and more accurate colors, making for a more realistic viewing experience.

This TV has HDR10 and HLG, so you can enjoy a broader range of color and contrast, resulting in a more vivid and dynamic picture.

With an impressive 1.07 billion display colors, the TV can produce a more vibrant and realistic image.

And with a large screen size of 55", you can immerse yourself in your favorite shows and movies like never before.

Whether watching the latest action movie or catching up on your favorite TV show, this TV will surely deliver an unforgettable viewing experience.

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Regarding connectivity, this TV offers a boatload of connectivity features to suit your needs. With 4 HDMI ports, you can easily connect all your favorite devices, from gaming consoles to Blu-ray players.

An Audio Return Channel (ARC) allows you to connect the TV to a soundbar or other audio device without needing a separate audio cable.

Additionally, there's a composite audio/video input, a digital optical audio output, and a headphone jack for private listening.

The TV also features a built-in Wi-Fi connection, allowing you to easily connect to the internet and access your favorite streaming services.

The wireless connection supports 802.11ac 2x2 dual-band, providing reliable and fast internet speeds on both 2.4GHz and 5GHz frequencies.

With a USB 2.0 port, you can easily access your personal media collection, such as videos, audio, and photo files, without needing additional devices.


The TCL 55 4k UHD HDR Smart Roku TV has two speakers that produce a combined 16W (8W + 8W) of audio output, making the audio quality remarkable.

The TV features Dolby Digital Plus, a premium audio format that provides a more immersive and cinematic audio experience, making you feel like you are in the middle of the action.

This feature lets you enjoy your favorite movies, TV shows, or sports events with more precise and high-quality audio.

It doesn't matter if you're watching a movie, playing a game, or just streaming music; the Dolby Digital Plus technology will provide an immersive audio experience.

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Wrapping Up

The TCL 55 4k UHD HDR Smart Roku TV - 55s21 is an excellent investment for a high-quality, personalized television experience.

It offers HDR technology, providing bright, accurate colors that deliver a realistic viewing experience.

The home screen is straightforward and personalized, providing seamless access to thousands of premium content, and the TV can be controlled with voice assistants like Alexa and Google Assistant.


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About the author

Jules Whitman