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| General Info | ||
|---|---|---|
| Model Number | Dell E2421HN | Acer KG251QG |
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| Price | ||
| Type | Monitor | Monitor |
| Year | 2020 | 2018 |
| Brand | Dell | Acer |
| Model Number | E2421HN | KG251QG |
| Alias | KG251QGbmiix | |
| Display | ||
| Screen Size Class | 24" (inches) | 25" (inches) |
| Diagonal Size | 23.81 in 60.5 cm 604.7 mm 1.98 ft |
24.5 in 62.2 cm 622.3 mm 2.04 ft |
| Screen Width | 20.75 in 52.7 cm 527.04 mm 1.73 ft |
21.41 in 54.4 cm 543.744 mm 1.78 ft |
| Screen Height | 11.67 in 29.6 cm 296.46 mm 0.97 ft |
11.91 in 30.3 cm 302.616 mm 0.99 ft |
| Display Type | IPS | TN |
| Display Bit Depth | 8 bits (6 bits + FRC) | 8 bits (6 bits + FRC) |
| Frame Rate Control | Yes | Yes |
| Max Number of Colors | 16777216 | 16777216 |
| Bits | 24 | 24 |
| Screen Aspect Ratio | 16:9 | 16:9 |
| Screen Resolution | 1920 x 1080 | 1920 x 1080 |
| Screen Pixel Pitch | 0.275 mm | 0.283 mm |
| Screen Pixel Density | 92 ppi | 89 ppi |
| Screen-to-Body Ratio | 86.91 % | 88.65 % |
| Backlight Source | W-LED | W-LED |
| NTSC 1953 | 72 % | 72 % |
| Screen Brightness | 250 cd/m² | 250 cd/m² |
| Static Screen Contrast | 1000 : 1 | 1000 : 1 |
| Dynamic Screen Contrast | 100000000 : 1 | |
| Screen Horizontal Viewing Angle | 178 ° | 170 ° |
| Screen Vertical Viewing Angle | 178 ° | 160 ° |
| Display Minimum Response Time | 5 ms | 1 ms |
| Display Average Response Time | 8 ms | |
| Display Coating | Anti-glare/Matte | Anti-glare/Matte (3H) |
| 3D | No | No |
| Size, weight, color | ||
| Case Depth | 2.06 in 5.2 cm 52.4 mm 0.17 ft |
2.2 in 5.6 cm 56 mm 0.18 ft |
| Case Weight | 3.25 kg 7 lbs |
3.7 kg 8 lbs |
| Case Width with Stand | 21.68 in 55.1 cm 550.6 mm 1.81 ft |
21.96 in 55.8 cm 557.89 mm 1.83 ft |
| Case Height with Stand | 16.52 in 42 cm 419.7 mm 1.38 ft |
16.92 in 43 cm 429.69 mm 1.41 ft |
| Case Depth with Stand | 6.73 in 17.1 cm 171 mm 0.56 ft |
8.48 in 21.5 cm 215.46 mm 0.71 ft |
| Case Weight with Stand | 4.27 kg 9 lbs |
4.2 kg 9 lbs |
| Case Color | Black | Black |
| Hardware | ||
| Built-in Camera | No | No |
| Connectivity | 1 x HDMI 1.4 1 x D-sub |
1 x 3.5 mm Audio Out 2 x HDMI 1.4 1 x D-sub |
| Audio | ||
| Audio Speakers | 2 x 2W | |
| Features | ||
| Cool Features | Flicker-free technology Low Blue Light Power Nap ComfortView Dell Display Manager |
Flicker-free technology HDCP (High-bandwidth Digital Content Protection) AMD FreeSync technology Blue Light Filter |
| Extra Features | Security lock slot | |
| Ergonomics | ||
| Case Width | 21.68 in 55.1 cm 550.6 mm 1.81 ft |
21.96 in 55.8 cm 557.89 mm 1.83 ft |
| Case Height | 12.85 in 32.7 cm 326.5 mm 1.07 ft |
13.1 in 33.3 cm 332.7 mm 1.09 ft |
| Vesa Mount Support | Yes | Yes |
| VESA Interface Standard Size | 100 x 100 | 100 x 100 |
| Removable VESA Stand | Yes | Yes |
| Height Adjustment | No | No |
| Landscape or Portrait Pivot Support | No | No |
| Left or Right Swivel Support | No | No |
| Forward and Backward Tilt Support | Yes | Yes |
| Forward Tilt | 5 ° | 5 ° |
| Backward Tilt | 21 ° | 15 ° |
| Frequency and Interpolation | ||
| Vertical Digital Frequency | 56 Hz - 76 Hz | 55 Hz - 75 Hz |
| Horizontal Digital Frequency | 30 kHz - 83 kHz | 30 kHz - 85 kHz |
| Screen Interpolation Measurement Unit | NULL | |
| Accessories | ||
| Extras | D-Sub cable HDMI cable |
Audio cable D-sub cable |
| Certificates and Standards | ||
| Licenses | Energy Star EPEAT TCO Certified Display |
ENERGY STAR ErP TCO Certified Displays |
| Usage and Storage Requirements | ||
| Safe Operating Temperature Level | 0 °C - 40 °C 32 °F - 104 °F |
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| Safe Operating Humidity Level | 10 % - 80 % | |
| Internal Storage Temperature | -20 °C - 60 °C -4 °F - 140 °F |
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| Internal Storage Humidity | 5 % - 90 % | |
| Max Operating Altitude | 5000 | |
| Max Storage Altitude | 12192 |
| Dell E2421HN | Acer KG251QG |
