Dell S3221QS User Manual page 21

Electrical specifications
Model
Video input signals
AC input voltage/
frequency/current
Inrush current
S3221QS
HDMI 2.0 (HDCP), 600 mV for each differential line,
100 ohm input impedance per differential pair
DisplayPort 1.2, 600 mV for each differential line, 100
ohm input impedance per differential pair
100 VAC to 240 VAC / 50 Hz or 60 Hz ± 3 Hz / 1.6 A
(max.)
120 V: 30 A (max.) at 0°C (cold start)
240 V: 60 A (max.) at 0°C (cold start)
About your monitor │ 21