| Model No |
55S421-CA |
55A79KQ |
| TV Type |
Smart TV |
Smart TV |
| Screen Size |
55 Inch (139 cm) |
55 Inch (139 cm) |
| Resolution |
4K 3840 x 2160 |
4K 3840 x 2160 |
| Aspect Ratio |
16:9 |
16:9 |
| Motion Rate |
120 Hz |
60 Hz |
| Viewing Angle |
178°/178° |
178°/178° |
| USB |
| USB Version |
: 2.0 |
| Supported Audio Formats |
: AAC, MP3, WMA, WAV ( PCM ), AIFF, FLAC, AC3 |
| Supported Video Formats |
: MKV (H.264), MP4, MOV ( H.264 ), TS ( H.264 ) |
| Supported Picture Formats |
: JPEG, PNG, GIF |
|
| USB Version |
: 2.0 |
| Supported Audio Formats |
: WMA, FLAC, MP3, AAC, WAV, AC-3, OPUS |
| Supported Video Formats |
: WEBM, MOV, WMV, FLV, TS, MKV, MP4, AVI |
| Supported Picture Formats |
: JPEG, BMP, PNG, GIF |
|
| Video |
| Backlight |
: 4K UHD HDR LED |
| HDR10 |
: Yes |
| Resolution |
: UHD |
| Clear Motion Index |
: 120Hz CMI |
| Display Colors |
: 1.07 Billion |
| Picture Engine |
: 4K Creative Pro Upscaling Engine |
|
| Backlight |
: 4K UHD QLED |
| HLG |
: Yes |
| HDR |
: Yes |
| HDR10 |
: Yes |
| Dolby Vision |
: Yes |
| HDR10+ Decoding |
: Yes |
| Immersive 4K HDR |
: Yes |
| Upscaling Ultra HD |
: Yes |
| Digital 3D Comb Filter |
: Yes |
| MPEG Noise Reduction |
: Yes |
| Image Noise Reduction |
: Yes |
| Quantum Dot Technology |
: Yes |
| Contrast |
: 3200:1 |
| Input Delay In Game Mode |
: ≤ 13 ms |
| Brightness |
: 300 Nits |
|
| Audio |
| Audio Output ( RMS ) |
: 2 Channel X 8 W |
| Dolby Processing |
: Dolby Digital |
| Audio Passthrough |
: Dolby Digital Plus |
|
| Sound Output ( RMS ) |
: 2 X 10 W |
| Custom Equalizer |
: Yes |
| Dolby Atmos System |
: Yes |
| Sound Technology |
: DTS Virtual X Decoding Dolby Atmos |
|
| Connectivity Options |
| HDMI 2.0 |
: 3, w/HDCP 2.2 ( 1 ARC ) |
| USB 2.0 |
: 1 |
| Ethernet / LAN |
: 1 Yes |
| RF Input ( NTSC, ATSC ) |
: 1 Yes |
| Audio Output Headphone |
: 1 Yes |
| SPDIF Digital Audio Optical |
: 1 Yes |
| AV Input |
: Composite Video + L&R Audio In |
| Wireless Connection |
: 802.11ac 2X2 Dual Band ( support 2.4GHz & 5GHz ) |
|
| HDMI ( 2.0 ) |
: 3 ( HDMI2.0 X 1, 3 ALLM, VRR ( 60Hz ), HDMI2.0 X 3 eARC, ALLM, VRR ( 60HZ )) |
| USB ( 2.0 ) |
: 2 |
| RF Tuner |
: 2 |
| Ethernet / LAN |
: 1 |
| S/PDIF Outputs |
: 1 |
| Headphone Jacks |
: 1 |
| Audio Inputs (L / R ) |
: 1 |
| Composite Inputs ( AV ) |
: 1 |
| Standard Interface ( CI+ ) |
: V2.0 |
| Bluetooth |
: Yes |
| Wi-Fi Technology |
: IEEE 802.11 a/b/g/n/ac-2.4G,5G |
|
| Smart TV Features |
| Operating System |
: Roku TV |
| CPU |
: Dual-core |
| GPU |
: Dual-core |
| Powerful Mobile App |
: Yes |
| Advanced PQ Setting With Mobile App |
: Yes |
|
| Operating System |
: VIDAA Smart OS |
| Netflix |
: Yes |
| Amazon |
: Yes |
| YouTube |
: Yes |
| Share Screen |
: Yes |
| Share To TV |
: Yes |
| Voice Control |
: Yes |
| Precision Colour |
: Yes |
| AirPlay 2 Support |
: Yes |
| Sharing Content |
: DMP, DMR |
| Important Apps |
: Game Center, App Store, VIDAA Free, VIDAA Art, AccuWeather, SWEET.TV, RLAXX, FIFA+, NBA, Disney+, Hungama Play, Plex, Redbull TV, Deezer, Toon Goggles, Kidoodle tv, UEFA TV, FITE, EON, DAZN, Rakuten TV, Prime Video, YouTube, Netflix |
|
| Other Features |
| Closed Caption |
: Yes |
| 1 Year Limited Warranty |
: Yes |
| Parental Control ( V-Chip ) |
: Yes |
| Accessible Menu System ( CVAA ) |
: Yes |
| Control Buttons |
: Power/Power/Menu, <,> |
| Multilingual On-Screen-Display |
: English, Spanish, French |
| Signal Format Capability |
: ATSC / NTSC / Clear QAM |
|
| Design |
: Bezel-Less Design |
| Color |
: Black, Dark Grey |
| Child Lock |
: Yes |
| Light Sensor |
: Yes |
| Digital & Analog Tuner |
: DVB-T2, T, C, S2, S |
| Media Player |
: Audio, Picture, video |
| Time Shift |
: Yes, Depending On The Location |
| PVR Function |
: Yes, Depending On The Location |
|
| General Details |
| Power Supply (Voltage, Hz) |
: AC 100V-240V 50/60Hz |
| Annual Power Consumption |
: 150 kWh/Y |
| Power Consumption Standby |
: <0.5 W |
| Weight Without Stand |
: 12.11 Kg |
| Weight With Stand |
: 12.29 Kg |
| Packaging Weight |
: 17.78 Kg |
| VESA Walll Mount Pattern |
: 200 mm X 200 mm |
|
| Power Supply |
: AC 100 V-240V 50/60Hz |
| Power Consumption |
: 160 W |
| Power Consumption Standby |
: 0.5 W |
| Energy Efficiency Class SDR |
: G |
| Energy Efficiency Class HDR |
: G |
| Product Weight Without Stand |
: 13 Kg |
| Product Weight With Stand |
: 13 Kg |
| Product Weight Packaged |
: 19 Kg |
| VESA Wall Mount Compatible |
: 300 mm X 200 mm |
|
| Supplied Accessories |
| Remote Control |
: Roku TV RC280 |
| 2 AAA Batteries |
: Yes |
| Screw Size |
: M6 X 12 |
| Quick Start Guide |
: Yes English |
|
| Remote Control |
: Yes |
| User Manual |
: Yes |
| Quick Set Up Guide |
: Yes |
|
|
Compare TCL 55S421-CA with:
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Compare Hisense 55A79KQ with:
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Key Differences
Both TVs come with smart platforms that support popular streaming apps and voice control features. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. From a practical standpoint, both options provide a reliable viewing experience for most users. TCL 55S421-CA and Hisense 55A79KQ are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. TCL 55S421-CA and Hisense 55A79KQ offer different motion rates (120 Hz vs 60 Hz), which can impact smoothness during fast-moving scenes like sports and gaming. TCL 55S421-CA and Hisense 55A79KQ differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Verdict: Choosing between TCL 55S421-CA and Hisense 55A79KQ depends on your usage, whether you prioritize display quality, smoother motion, or smart features.
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