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| General Info | ||
|---|---|---|
| Model Number | Lenovo L28u-35 | Dell S2721QS |
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| Price | ||
| Type | Monitor | Monitor |
| Year | 2022 | 2020 |
| Brand | Lenovo | Dell |
| Model Number | L28u-35 | S2721QS |
| Alias | 66ECGAC4 | |
| Display | ||
| Screen Size Class | 28" (inches) | 27" (inches) |
| Diagonal Size | 28 in 71.1 cm 711.2 mm 2.33 ft |
26.96 in 68.5 cm 684.7 mm 2.25 ft |
| Screen Width | 24.45 in 62.1 cm 620.928 mm 2.04 ft |
23.49 in 59.7 cm 596.736 mm 1.96 ft |
| Screen Height | 13.44 in 34.1 cm 341.28 mm 1.12 ft |
13.22 in 33.6 cm 335.664 mm 1.1 ft |
| Display Manufacturer | Innolux | |
| Display Type | AAS IPS | IPS |
| Display Bit Depth | 10 bits (8 bits + FRC) | 10 bits |
| Frame Rate Control | Yes | |
| Max Number of Colors | 1073741824 | 1073741824 |
| Bits | 30 | 30 |
| Screen Aspect Ratio | 16:9 | 16:9 |
| Screen Resolution | 3840 x 2160 | 3840 x 2160 |
| Screen Pixel Pitch | 0.16 mm | 0.155 mm |
| Screen Pixel Density | 157 ppi | 163 ppi |
| Screen-to-Body Ratio | 89.03 % | 89.83 % |
| Backlight Source | W-LED | W-LED |
| DCI P3 | 90% | |
| sRGB | 99 % | 99 % |
| Screen Brightness | 300 cd/m² | 350 cd/m² |
| Max Screen Brightness | 390 cd/m² | |
| Static Screen Contrast | 1000 : 1 | 1300 : 1 |
| Dynamic Screen Contrast | 3000000 : 1 | |
| Screen Horizontal Viewing Angle | 178 ° | 178 ° |
| Screen Vertical Viewing Angle | 178 ° | 178 ° |
| Display Minimum Response Time | 4 ms | 4 ms |
| Display Average Response Time | 6 ms | 8 ms |
| Display Maximum Response Time | 14 ms | |
| Display Coating | Anti-glare/Matte | Anti-glare/Matte (3H) |
| HDR | HDR10 | |
| 3D | No | No |
| Size, weight, color | ||
| Case Depth | 1.93 in 4.9 cm 48.9 mm 0.16 ft |
2.18 in 5.5 cm 55.4 mm 0.18 ft |
| Case Weight | 4.6 kg 10 lbs |
4.7 kg 10 lbs |
| Case Width with Stand | 25.07 in 63.7 cm 636.9 mm 2.09 ft |
24.08 in 61.2 cm 611.6 mm 2.01 ft |
| Case Height with Stand | 16.51 in 41.9 cm 419.3 mm 1.38 ft |
15.75 in 40 cm 400.1 mm 1.31 ft |
| Case Depth with Stand | 8.46 in 21.5 cm 215 mm 0.71 ft |
6.88 in 17.5 cm 174.7 mm 0.57 ft |
| Case Weight with Stand | 6.6 kg 15 lbs |
6.4 kg 14 lbs |
| Case Color | Raven Black | Silver |
| Hardware | ||
| Built-in Camera | No | No |
| Connectivity | 1 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.4 |
1 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.2 |
| Audio | ||
| Audio Speakers | 2 x 2W | 2 x 3W |
| Features | ||
| Cool Features | Flicker-free technology Natural Low Blue Light 3-side NearEdgeless design AMD FreeSync technology |
Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology |
| Extra Features | Anti-theft stand lock slot - Kensington | Anti-theft stand lock slot - Kensington |
| Ergonomics | ||
| Case Width | 25.07 in 63.7 cm 636.9 mm 2.09 ft |
24.08 in 61.2 cm 611.6 mm 2.01 ft |
| Case Height | 14.71 in 37.4 cm 373.7 mm 1.23 ft |
14.35 in 36.5 cm 364.6 mm 1.2 ft |
| Vesa Mount Support | Yes | Yes |
| VESA Interface Standard Size | 100 x 100 | 100 x 100 |
| Removable VESA Stand | Yes | Yes |
| Height Adjustment | Yes | Yes |
| Height Adjustment Range | 150 mm 15 cm 5.9055 in 0.4921 ft |
110 mm 11 cm 4.3307 in 0.3609 ft |
| Landscape or Portrait Pivot Support | Yes | Yes |
| Left Pivot | 90 ° | 90 ° |
| Right Pivot | 90 ° | 90 ° |
| Left or Right Swivel Support | Yes | Yes |
| Left Swivel | 360 ° | 30 ° |
| Right Swivel | 360 ° | 30 ° |
| Forward and Backward Tilt Support | Yes | Yes |
| Forward Tilt | 5 ° | 5 ° |
| Backward Tilt | 22 ° | 21 ° |
| Frequency and Interpolation | ||
| Vertical Digital Frequency | 60 Hz | 40 Hz - 60 Hz |
| Horizontal Digital Frequency | 130 kHz - 137 kHz | |
| Screen Interpolation Measurement Unit | NULL | NULL |
| Accessories | ||
| Extras | HDMI cable | HDMI cable |
| Certificates and Standards | ||
| Licenses | CCC China Energy Efficiency Standard Tier 2 ENERGY STAR Eyesafe Display Certification RoHS (EU 2002/95/EC) TCO 9.0 TCO Edge 2.0 TÜV Low Blue Light (Hardware Solution) TÜV Rheinland Eye Comfort Volatile Organic Compound Certification Windows Certification |
ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light |
| Usage and Storage Requirements | ||
| Safe Operating Temperature Level | 0 °C - 45 °C 32 °F - 113 °F |
0 °C - 40 °C 32 °F - 104 °F |
| Safe Operating Humidity Level | 10 % - 80 % | 10 % - 80 % |
| Internal Storage Temperature | -20 °C - 60 °C -4 °F - 140 °F |
-20 °C - 60 °C -4 °F - 140 °F |
| Internal Storage Humidity | 5 % - 95 % | 5 % - 90 % |
| Max Operating Altitude | 5000 | 5000 |
| Max Storage Altitude | 12192 | 12192 |
| Lenovo L28u-35 | Dell S2721QS |
