| Brand | LG |
| Model | 27U421A |
| Model alias | 27U421A-B |
| Model year | 2025 |
| Size class | 27 |
| Diagonal | 685.655 mm 68.5655 cm 26.9943 in 2.2495 ft |
| Width | 596.736 mm 59.6736 cm 23.4935 in 1.9578 ft |
| Height | 335.664 mm 33.5664 cm 13.2151 in 1.1013 ft |
| Panel manufacturer | AU Optronics |
| Panel model | M270HVR01.C CELL |
| Panel type | VA |
| Panel bit depth | 8 bits (6 bits + FRC) |
| FRC | Yes |
| Colors | 24 |
| Aspect ratio | 16:9 |
| Resolution | 1920 x 1080 |
| Resolution tags | Full HD / 1080p |
| Pixel pitch | 0.311 mm 0.0311 cm 0.0123 in 0.001 ft |
| Pixel density | 81 ppi 32 ppcm |
| Display area | 91.21 % |
| Backlight | W-LED |
| Brightness | 250 |
| Static contrast | 3000 : 1 |
| HDR | HDR10 |
| Horizontal viewing angle | 178 |
| Vertical viewing angle | 178 |
| Coating | Anti-glare/Matte (3H) |
| 3D | No |
| Maximal frequency | 100 |
| 110V | 100 V - 120 V |
| 220V | 220 V - 240 V |
| Alternating current frequency | 50 Hz - 60 |
| Power consumption (off) | 0.3 |
| Power consumption (sleep) | 0.3 |
| Width | 610 mm 61 cm 24.0157 in 2.0013 ft |
| Height | 360 mm 36 cm 14.1732 in 1.1811 ft |
| Depth | 45.7 mm 4.57 cm 1.7992 in 0.1499 ft |
| Weight | 3 kg 6.61 lbs |
| Width with stand | 610 mm 61 cm 24.0157 in 2.0013 ft |
| Height with stand | 452 mm 45.2 cm 17.7953 in 1.4829 ft |
| Depth with stand | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Weight with stand | 3.7 kg 8.16 lbs |
| Box width | 690 mm 69 cm 27.1654 in 2.2638 ft |
| Box height | 440 mm 44 cm 17.3228 in 1.4436 ft |
| Box depth | 142 mm 14.2 cm 5.5906 in 0.4659 ft |
| Box weight | 4.94 kg 10.89 lbs |
| Colors | Black |
| VESA mount | Yes |
| VESA interface | 100 x 100 |
| Removable stand | Yes |
| Height adjustment | No |
| Landscape/portrait pivot | No |
| Left/right swivel | No |
| Forward/backward tilt | Yes |
| Forward tilt | 5 |
| Backward tilt | 21 |
| Features | 3-Side Virtually Borderless Design Adaptive-Sync technology Black Stabilizer Color Weakness Dynamic Action Sync Flicker-free technology HDR Effect LG Switch Low Blue Light Reader Mode Smart Energy Saving Super Resolution+ |
| Operating temperature | 0 °C - 40 °C 32 °F - 104 °F |
| Operating humidity | 10 % - 80 % |
| sRGB | 99 % |
| Stand depth | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Other | High-bandwidth Digital Content Protection (HDCP) |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F |
| Storage humidity | 5 % - 85 % |
| Additional features | Anti-theft stand lock slot - Kensington |
| Accessories | HDMI cable |
| Speakers | No |
| HDMI 1.4 | 1 |
| Camera | No |
| Has HDMI | Yes |
| Is Gaming | No |
| Is Curved | Yes |
| USB 3.0 (Type-C; 15W) | 1 |
| 3.5 mm Audio Out (3-pole) | 1 |
| Brand | LG |
| Model | 27U421A |
| Model alias | 27U421A-B |
| Model year | 2025 |
| Size class | 27 |
| Diagonal | 685.655 mm 68.5655 cm 26.9943 in 2.2495 ft |
| Width | 596.736 mm 59.6736 cm 23.4935 in 1.9578 ft |
| Height | 335.664 mm 33.5664 cm 13.2151 in 1.1013 ft |
| Panel manufacturer | AU Optronics |
| Panel model | M270HVR01.C CELL |
| Panel type | VA |
| Panel bit depth | 8 bits (6 bits + FRC) |
| FRC | Yes |
| Colors | 24 |
| Aspect ratio | 16:9 |
| Resolution | 1920 x 1080 |
| Resolution tags | Full HD / 1080p |
| Pixel pitch | 0.311 mm 0.0311 cm 0.0123 in 0.001 ft |
| Pixel density | 81 ppi 32 ppcm |
| Display area | 91.21 % |
| Backlight | W-LED |
| Brightness | 250 |
| Static contrast | 3000 : 1 |
| HDR | HDR10 |
| Horizontal viewing angle | 178 |
| Vertical viewing angle | 178 |
| Coating | Anti-glare/Matte (3H) |
| 3D | No |
| Maximal frequency | 100 |
| 110V | 100 V - 120 V |
| 220V | 220 V - 240 V |
| Alternating current frequency | 50 Hz - 60 |
| Power consumption (off) | 0.3 |
| Power consumption (sleep) | 0.3 |
| Width | 610 mm 61 cm 24.0157 in 2.0013 ft |
| Height | 360 mm 36 cm 14.1732 in 1.1811 ft |
| Depth | 45.7 mm 4.57 cm 1.7992 in 0.1499 ft |
| Weight | 3 kg 6.61 lbs |
| Width with stand | 610 mm 61 cm 24.0157 in 2.0013 ft |
| Height with stand | 452 mm 45.2 cm 17.7953 in 1.4829 ft |
| Depth with stand | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Weight with stand | 3.7 kg 8.16 lbs |
| Box width | 690 mm 69 cm 27.1654 in 2.2638 ft |
| Box height | 440 mm 44 cm 17.3228 in 1.4436 ft |
| Box depth | 142 mm 14.2 cm 5.5906 in 0.4659 ft |
| Box weight | 4.94 kg 10.89 lbs |
| Colors | Black |
| VESA mount | Yes |
| VESA interface | 100 x 100 |
| Removable stand | Yes |
| Height adjustment | No |
| Landscape/portrait pivot | No |
| Left/right swivel | No |
| Forward/backward tilt | Yes |
| Forward tilt | 5 |
| Backward tilt | 21 |
| Features | 3-Side Virtually Borderless Design Adaptive-Sync technology Black Stabilizer Color Weakness Dynamic Action Sync Flicker-free technology HDR Effect LG Switch Low Blue Light Reader Mode Smart Energy Saving Super Resolution+ |
| Operating temperature | 0 °C - 40 °C 32 °F - 104 °F |
| Operating humidity | 10 % - 80 % |
| sRGB | 99 % |
| Stand depth | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Other | High-bandwidth Digital Content Protection (HDCP) |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F |
| Storage humidity | 5 % - 85 % |
| Additional features | Anti-theft stand lock slot - Kensington |
| Accessories | HDMI cable |
| Speakers | No |
| HDMI 1.4 | 1 |
| Camera | No |
| Has HDMI | Yes |
| Is Gaming | No |
| Is Curved | Yes |
| USB 3.0 (Type-C; 15W) | 1 |
| 3.5 mm Audio Out (3-pole) | 1 |
