| ENERGY STAR Partner |
| NEC Display Solutions of America, Inc. |
NEC Display Solutions of America, Inc. |
| Product Category |
| Displays |
Displays |
| Type |
| Signage Display |
Signage Display |
| Brand Name |
| NEC |
NEC |
| Model Name |
| C551 |
M321 |
| Model Number |
| C551 |
M321 |
| Date Available On Market |
| October 11, 2017 |
February 15, 2022 |
| Date Certified |
| November 30, 2017 |
December 13, 2021 |
| Markets |
| United States, Switzerland, Taiwan, Japan, Canada |
United States, Switzerland, Taiwan, Japan, Canada |
| CB Model Identifier |
| ES_1021168_C551_12192019110324_7373533 |
ES_1021168_M321_12132021160920_6499251 |
| Meets ENERGY STAR Most Efficient 2024 Criteria |
| No |
No |
| Product Type |
| Signage Display |
Signage Display |
| Panel Type |
| VA LCD |
IPS LCD |
| Native Resolution (pixels) |
| 1920 x 1080 |
1920 x 1080 |
| Total Native Resolution (megapixels) |
| 2 |
2.1 |
| Screen Size |
| 54.6 inches / 138.68 cm |
31.5 inches / 80.01 cm |
| Screen Area (square inches) |
| 1275.67 inches / 3240.20 cm |
424 inches / 1076.96 cm |
| Model Features |
| Full Network Connectivity,Built-In Speakers,Other |
Full Network Connectivity,Built-In Speakers,User Adjustable Backlight |
| Features Enabled in Default On Mode |
| Built-In Speakers |
Full Network Connectivity |
| Features Enabled in Default Sleep Mode |
| None |
Full Network Connectivity |
| Signal or Data Interfaces |
| VGA,RJ45,Other,Display,HDMI,USB |
RS232,RJ45,Other,Display,HDMI,USB |
| Power Source |
| Ac to dc internal power supply |
Ac to dc internal power supply |
| On Mode Power (watts) |
| 67 |
30.88 |
| Maximum On Mode Power Limit for Signage Certification (watts) |
| 105 |
49.53 |
| Sleep Mode Power (watts) |
| 1 |
0.83 |
| Maximum Sleep Mode Power Limit for Signage Certification (watts) |
| 4 |
3.5 |
| Off Mode Power (watts) |
| 0 |
0 |
| Maximum Luminance (candelas per square meter) |
| 400 |
450 |
| Enhanced-Performance Display? |
| No |
No |
| Color Gamut |
| 1 |
N/A |
| Color Spaces Supported |
| NTSC |
NTSC |
| High Dynamic Range (HDR) |
| N/A |
N/A |
| Display Contrast Ratio at 0 deg. Horiz. Viewing Angle |
| 4,000 |
1200 |
| USB-C with Power Delivery Supported |
| No |
No |
| Tiled Display System |
| No |
No |
