Lenovo ThinkVision E28u-20 28" 4K HDR Monitor - Manual (Page 27)

Supported display
modes
Horizontal frequency 15kHz - 160kHz
Vertical frequency 40Hz - 62.5Hz
Self-resolution 3840x 2160@ 60 Hz
Temperature
At working time 0° to 40°C (32°F to 104°F)
During storage -20° to 60°C (-4°F to 140°F)
During transport -20° to 60°C (-4°F to 140°F)
Humidity At working time 10% to 80% (non-condensing)
During storage 5% to 95% (non-condensing)
During transport 5% to 95% (non-condensing)
Chapter 3. Reference Information 3-2