| ENERGY STAR Partner |
| Dell Inc. |
Dell Inc. |
| Product Category |
| Displays |
Displays |
| Type |
| Monitor |
Monitor |
| Brand Name |
| DELL |
DELL |
| Model Name |
| U2720Q |
S2421Ho |
| Model Number |
| U2720Qt |
S2421Ho |
| Additional Model Information |
| U2720QM,, |
S2421HN,S2421HN, |
| Date Available On Market |
| January 30, 2020 |
January 15, 2021 |
| Date Certified |
| August 21, 2019 |
January 7, 2021 |
| Markets |
| United States, Switzerland, Taiwan, Japan, Canada |
United States, Switzerland, Taiwan, Japan, Canada |
| CB Model Identifier |
| ES_29573_U2720Qt_08222019221726_9150664 |
ES_29573_S2421Ho_01082021170524_9746594 |
| Meets ENERGY STAR Most Efficient 2024 Criteria |
| No |
No |
| Product Type |
| Monitor |
Monitor |
| Panel Type |
| IPS LCD |
TN LCD |
| Native Resolution (pixels) |
| 3840 x 2160 |
1920 x 1080 |
| Total Native Resolution (megapixels) |
| 8 |
2.1 |
| Screen Size |
| 27 inches / 68.58 cm |
23.8 inches / 60.45 cm |
| Screen Area (square inches) |
| 310.47 inches / 788.59 cm |
242.2 inches / 615.19 cm |
| Model Features |
| USB-C |
None |
| Features Enabled in Default On Mode |
| None |
None |
| Features Enabled in Default Sleep Mode |
| None |
None |
| Signal or Data Interfaces |
| Display,HDMI,USB |
HDMI |
| Power Source |
| Ac to dc internal power supply |
Ac to dc internal power supply |
| On Mode Power (watts) |
| 25 |
10.97 |
| Sleep Mode Power (watts) |
| 1 |
0.1 |
| Off Mode Power (watts) |
| 0 |
0.1 |
| Monitor Total Energy Consumption at 115 Volts (kWh/yr) |
| 80 |
34.2 |
| Maximum Total Energy Consumption Limit for Monitor Certification (kWh/yr) |
| 92 |
45.73 |
| Maximum Luminance (candelas per square meter) |
| 400 |
262.3 |
| Enhanced-Performance Display? |
| Yes |
No |
| Color Gamut |
| 0 |
N/A |
| Color Spaces Supported |
| None |
None |
| High Dynamic Range (HDR) |
| N/A |
N/A |
| Display Contrast Ratio at 0 deg. Horiz. Viewing Angle |
| 1,300 |
1000 |
| Reported Contrast Ratio at -85 Degrees (Left) Horizontal Viewing Angle |
| 116 |
N/A |
| Reported Contrast Ratio at +85 Degrees (Right) Horizontal Viewing Angle |
| 113 |
N/A |
| USB-C with Power Delivery Supported |
| Yes |
No |
| Maximum Power Delivery (W) |
| 90 |
N/A |
| Tiled Display System |
| No |
No |
