TCL 55S421 Review and Specifications

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TCL 55S421 Overview

The Class-4 Series TCL 55S421 is a smart 55 inch 4K UHD Roku TV with WiFi.

TCL 55S421

The Roku TCL TV provides access to over 500k content via its simple-to-use interface. The TV offers Dual band Wi-Fi, ethernet, and USB 2.0 connectivity options while lacking Bluetooth.

HDR10, TCL’s proprietary 4K Creative Pro technology, voice control through Siri, Google, and Alexa give 55S421 an edge over its competitors in the same segment. Read TCL 65S421 review.

Inclusions

  • Quick Start Guide
  • Roku TV RC280 remote control
  • Two “AAA” remote batteries

Pros

  • 4K UHD (3840 x 2160)
  • Dual band WiFi and Ethernet
  • 4K Creative Pro upscaling
  • Easy navigation with 20 buttons RC282 remote

Cons

  • No HDR10+
  • No Bluetooth
  • No Dolby Vision

Specifications

BrandTCL
CountryUSA
Series 24
Model55S421
Release Year2018
Size55 inch
Smart TV
DISPLAY
Actual Size (Diagonal)54.6 inch
Resolution4K UHD (3840 x 2160)
Refresh Rate50 Hz/60 Hz
Backlight TypeLED
Color30 bits
Color Depth1.07 billion
Display TypeLCD
Display Area91.16%
LED TypeDirect LED
Panel Bit Depth8 bits + FRC
Frame Rate Control (FRC)
Panel TypeVA
Screen DesignFlat
Viewing Angle178 °
Aspect Ratio16:9
VIDEO
Frame Interpolation Frequency120Hz
Upscaling4K Creative Pro
Frame Interploation TechniqueClear Motion
3D Capability
HDR10+
Dolby Vision
Advanced HDR by Technicolor®
IMAX Enhanced
AMD Freesync™
NVidia G-Sync
4K HFR
2K HFR
VRR
HGIG Compatibility
Black Frame Insertion
Filmmaker Mode
Auto Low Latency Mode
HDR10
AUDIO
Speaker Power Rating8W + 8W
Dolby Digital Plus
WiSA Ready
CONNECTIVITY
Ethernet Input
Wi-Fi
Wi-Fi Frequency2.4 GHz, 5 GHz
Wi-Fi Protocol802.11ac 2×2 Dual Band (support 2.4GHz & 5GHz)
Bluetooth
Chromecast
Google Home
Virtual Assistant
Works with Alexa
3.5mm headphone Audio Output
Component Inputs
Composite Inputs
HDCP Version2.2
HDMI Audio Return Channel (ARC)
HDMI InputsThree
HDMI VersionTwo
HDMI-CEC
IF (Satellite) Inputs
Optical Audio Output
RCA Audio Outputs
RF (Terrestrial / Cable ) InputsOne
RS-232C Remote
USB 3.0 Ports
USB InputsOne
OTHER
Advanced PQ Setting with Mobile App
Closed Captions
CPU Cores2
GPU Cores2
Mobile App
On-Screen Display LanguagesEnglish, Spanish, French
Operating SystemRoku
Parental Control (V-Chip)
Teletext
VIDEO FORMATS
3GPP
Accessible Menu System (CVAA)
ASF
AV1
AVCHD
AVI
DivX
Flash Video
GIFV
H.263
H.264
H.265
M2TS
MKV
MOV
MP4
MPEG-2
MPEG-4
OCG
QuickTime
RealVideo
RM
TS
VC-1
VOB
VP7
VP8
VP9
VRO
WEBM
WebM
WMV
Xvid
AUDIO FORMATS
3GP
AA
AAC
AAX
AC4
AIFF
ALAC
APE
aptX
AU
CDA
DSS
DVF
eAAC+
EAC3
FLAC
GSM
HE-AAC
IVS
LPCM
M4A
MIDI
MP2
MP3
OGG
OPUS
ORG
RAW
RealAudio
SLN
TTA
VOC
VOX
WAV
WMA
IMAGE FORMATS
BAT
BMP
CGM
EPS
Exif
GIF
GIF
HEIF
JPEG
JPS
MPO
PNG
PPM
RAW
SVG
TIFF
WebP
TUNER
Analog TunerNTSC
Color systemPAL / SECAM / NTSC
Digital Cable TV SystemClear QAM
Digital Terrestrial TV SystemATSC
Digital Tuner✔ 1
NEXTGEN TV (ATSC 3.0)
SAT Tuner
GENERAL
Power SupplyAC 120 V, 60 Hz
Power Consumption (In Standby)0.5W
Dimension Without Stand(W x H x D)49.09 x 28.50 x 3 inch (124.71 x 72.39 x 7.62 cm)
Dimension With Stand (W x H x D)49.09 x 30.80 x 8.70 inch (124.71 x 78.23 x 22.1 cm)
Stand Size42.3 inch (107.44 cm)
Dimension of Package (W x H x D)55.1 x 34 x 6.6 inch (139.95 x 86.36 x 16.76 cm)
VESA Wall Mount
VESA Hole Pitch (W x H)200 mm x 200 mm (7.87 x 7.87 inch)
Wall mount screwM6 x 12
Weight With Stand29.98 lbs (13.60 kg)
Weight Without Stand29.54 lbs (13.40 kg)
Weight of Package39.20 lbs (17.78 kg)
Operating Temperature5 °C – 35 °C
Operating Humidity20% – 80%
WARRANTY
Warranty1 year limited warranty

Final Verdict

We performed the TCL 55S421 review by testing and analyzing each aspect carefully.

Also, read TCL 55S423 review.

55S421 4K Roku TV is a nice addition by TCL in the 55 inch TV range. The TV boasts various features including HDR10, 4K Creative Pro Upscaling, Wi-Fi but lacks Bluetooth.

Frequently Asked Questions

  1. Does the TCL 55S421 have Bluetooth?

    TCL 55S421 Roku TV does not have Bluetooth.

  2. Where to find the TCL 55S421 user manual?

    You can download the TCL 55S421 Roku TV manual here.

  3. What is the difference between TCL 55S421 and 55S425?

    The price for TCL 55S421 is slightly lower than 55S425. 55S421 comes with Roku TV RC282 while 55S425 comes with Roku TV RC280.

  4. When was 55S421 introduced?

    It was introduced in the year 2018.

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Richard

About Richard

Over the years, Richard has tried his hand at a variety of creative outlets. While he doesn't consider himself to have reached a level of expertise, Richard has mastered various instruments and most recently enjoys composing cinematic works that take listeners on an emotional journey. He takes great pride in remaining unbiased and dedicated to the audience, constantly striving for improvement and innovation. He is an audiophile and loves to test out new home theater receivers, music systems, hi-fi systems, soundbars, speakers, televisions, earphones... pretty much anything that can produce sound!

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