(Open Box) VIZIO 55" Class 4K UHD Quantum SmartCast Smart TV HDR M-Series M556-H
(Open Box) VIZIO 55" Class 4K UHD Quantum SmartCast Smart TV HDR M-Series M556-H
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(Open Box) VIZIO 55" Class 4K UHD Quantum SmartCast Smart TV HDR M-Series M556-H

3,430 ratings

Key item features

  • Vibrant Quantum Color: VIZIO's Quantum Color technology, combined with an Active Full Array backlight, delivers over a billion hues for cinematic color volume and a more immersive viewing experience.
  • Dynamic Picture Quality: Features Active Full Array with 10 local dimming zones for deep black levels and stunning contrast, alongside Dolby Vision HDR, HDR10+, and HLG support for incredible brightness and color.
  • Intelligent 4K Processing: The lightning-fast IQ Active processor provides superior picture processing, intelligent 4K upscaling, and fine-tunes individual pixels for remarkable detail and reduced noise.
  • Optimized Gaming Engine: The V-Gaming Engine automatically optimizes Xbox and PlayStation gameplay with features for smoother graphics, responsive gaming, and enhanced 4K HDR picture quality.
  • SmartCast Streaming Hub: Enjoy instant access to top-tier streaming services like Netflix, Disney+, and YouTube via SmartCast, with additional free streaming channels and built-in Apple AirPlay & Chromecast.
  • Versatile Voice Control: Seamlessly integrates with popular voice assistants including Siri, Google Assistant, and Alexa-enabled devices for hands-free control of the TV and smart home functions.
  • Advanced Connectivity: Equipped with 3 UHD/HDR-Ready HDMI ports with HDMI 2.1, eARC, and Dolby Atmos passthrough, plus DTS Virtual X advanced virtual surround sound and a USB multimedia port.
  • Enhanced Movie Experience: Cinemawide Black Bar Detection automatically dims backlights in black bars for 21:9 content, providing deeper black levels and an authentic movie-watching experience.
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Customer ratings & reviews

4.5 out of 5 stars
stars
3,430 ratings2,689 reviews
How item rating is calculated
  1. 5 stars73% (2,520)
  2. 4 stars15% (504)
  3. 3 stars3% (120)
  4. 2 stars3% (92)
  5. 1 star6% (194)

Reviews summary

Pros

  • : Offers excellent quality and features at this price.
  • : Displays sharp and vibrant images with great color accuracy.
  • : Displaying a wide range of colors.
  • : Easy to navigate and understand.
  • : Provides clear sound suitable for tv use without additional equipment.

Neutral

  • : Offers a range of pre-installed options, but selection can be limited.
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Showing 1-3 of 2,689 reviews

Sep 24, 2026
Reviewer name: Kc1215
5 out of 5 stars
5 out of 5 stars review

Still a great picture

[This review was collected as part of a promotion.] I actually hadn't used my TV in about 2 years. I recently reconnected it and I am still impressed with the quality of the picture.

Review from vizio.com
Helpful?1AOK98QA4KGG491927729
Aug 5, 2026
Reviewer name: Tykie50
5 out of 5 stars
5 out of 5 stars review

55 inch visual picture quality perfect

[This review was collected as part of a promotion.] This is my second visual. I have two going in my house right now and I love the picture quality and I love the way. The apps are. It's a great product. I recommended highly

Review from vizio.com
Helpful?1AOK98QA4KGG491927729
Sep 5, 2026
Reviewer name: HAC77
5 out of 5 stars
5 out of 5 stars review

Great TV 5 years and still going

[This review was collected as part of a promotion.] I bought this several years ago and it's still working well after hundreds of hours of watching TV and playing video games.

Review from vizio.com
Helpful?1AOK98QA4KGG491927729
Current price is $289.00
Price when purchased online
5 free offers, including Apple TV up to 1 month free
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