DELL S Series S3221QSA. Display diagonal: 31.5", Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra HD, Display technology: LCD, Response time: 4 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). Built-in USB hub, USB hub version: 3.2 Gen 1 (3.1 Gen 1). VESA mounting, Height adjustment. Product color: Black, Silver

Display diagonal	31.5"
Display resolution	3840 x 2160 pixels
Native aspect ratio	16:9
Display technology	LCD
Touchscreen	No
HD type	4K Ultra HD
Panel type	VA
Response time	4 ms
Screen shape	Curved
Contrast ratio (typical)	3000:1
Maximum refresh rate	60 Hz
Display number of colors	1.07 billion colors
Backlight type	LED
Display brightness (peak)	300 cd/m²
Display brightness (typical)	300 cd/m²
Anti-glare screen	Yes
Screen curvature rating	1800R
Supported video modes	480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Viewing angle, horizontal	178°
Viewing angle, vertical	178°
Response time (fast)	5 ms
Pixel pitch	0.00715 x 0.00715" (0.182 x 0.182 mm)
Pixel density	139 ppi
Viewable size, horizontal	27.4" (69.7 cm)
Viewable size, vertical	15.4" (39.2 cm)
Viewable size diagonal	31.5" (80 cm)
Digital horizontal frequency	29 - 140 kHz
Digital vertical frequency	40 - 60 Hz
Display diagonal (metric)	31.5" (80 cm)
High Dynamic Range (HDR) supported	No
Haze rate	25%
Surface hardness	3H
Colour gamut standard	DCI-P3
Color gamut	90%
sRGB coverage (typical)	99%
NVIDIA G-SYNC	No
AMD FreeSync	Yes
Flicker-free technology	Yes
Built-in speaker(s)	Yes
Built-in camera	No
Number of speakers	2
RMS rated power	10 W
Market positioning	Office
Product color	Black, Silver
Front bezel color	Black
Detachable stand	Yes
Feet color	Silver
Built-in USB hub	Yes
HDMI	Yes
Headphone out	Yes
USB hub version	3.2 Gen 1 (3.1 Gen 1)
USB upstream port type	USB Type-B
Number of USB Type-B upstream ports quantity	1
USB Type-A downstream ports quantity	2
HDMI ports quantity	2
HDMI version	2.0
DisplayPorts quantity	1
DisplayPort version	1.2
HDCP	Yes
HDCP version	2.2
AC (power) in	Yes
Wi-Fi	No
VESA mounting	Yes
Cable lock slot	Yes
Height adjustment	Yes
Panel mounting interface	100 x 100 mm
Cable management	Yes
Cable lock slot type	Kensington
Adjustable height (max)	2.76" (7 cm)
Pivot	No
Swiveling	No
Tilt adjustment	Yes
Tilt angle range	-5 - 21°
Picture-in-Picture	Yes
On Screen Display (OSD)	Yes
Plug and Play	Yes
LED indicators	Yes
Energy efficiency class (SDR)	G
Energy efficiency class (HDR)	G
Energy consumption (SDR) per 1000 hours	33 kWh
Energy consumption (HDR) per 1000 hours	56 kWh
Power consumption (typical)	33 W
Power consumption (standby)	0.2 W
Power consumption (max)	91 W
Power consumption (off)	0.2 W
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Input current	1.6 A
Power supply type	Internal
Energy efficiency scale	A to G
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-20 - 60 °C
Operating relative humidity (H-H)	10 - 80%
Storage relative humidity (H-H)	10 - 90%
Operating altitude	0 - 196850.4" (0 - 5000 m)
Non-operating altitude	196850.4 - 480000" (5000 - 12192 m)
Width (with stand)	27.9" (709.2 mm)
Depth (with stand)	8.15" (207 mm)
Height (with stand)	20.4" (518.1 mm)
Weight (with stand)	23.1 lbs (10.5 kg)
Width (without stand)	27.9" (709.2 mm)
Depth (without stand)	2.52" (64 mm)
Height (without stand)	16.7" (424.8 mm)
Weight (without stand)	16.3 lbs (7.4 kg)
Bezel width (side)	0.323" (8.2 mm)
Bezel width (top)	0.319" (8.1 mm)
Bezel width (bottom)	0.949" (2.41 cm)
Package weight	33.5 lbs (15.2 kg)
Stand included	Yes
Cables included	AC, HDMI, USB
Doesn't contain	PVC/BFR
Heavy metals free	Hg (mercury)
Compliance certificates	RoHS
Ethernet LAN (RJ-45) ports	0
European Product Registry for Energy Labelling (EPREL) code	1323868