Comparison between Dell U2421HE vs Dell S2721HN

General Info
Model Number	Dell U2421HE	Dell S2721HN

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2020	2020
Brand	Dell	Dell
Model Number	U2421HE	S2721HN
Alias		S2721NX
Display
Screen Size Class	24" (inches)	27" (inches)
Diagonal Size	23.81 in 60.5 cm 604.7 mm 1.98 ft	27 in 68.6 cm 685.891 mm 2.25 ft
Screen Width	20.75 in 52.7 cm 527.04 mm 1.73 ft	23.54 in 59.8 cm 597.89 mm 1.96 ft
Screen Height	11.67 in 29.6 cm 296.46 mm 0.97 ft	13.24 in 33.6 cm 336.312 mm 1.1 ft
Display Type	IPS	IPS
Display Bit Depth	8 bits	8 bits
Max Number of Colors	16777216	16777216
Bits	24	24
Screen Aspect Ratio	16:9	16:9
Screen Resolution	1920 x 1080	1920 x 1080
Screen Pixel Pitch	0.275 mm	0.311 mm
Screen Pixel Density	92 ppi	81 ppi
Screen-to-Body Ratio	92.49 %	90.67 %
Backlight Source	W-LED	W-LED
DCI P3	89%
sRGB	99 %
NTSC 1953		72 %
Screen Brightness	250 cd/m²	300 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Minimum Response Time	5 ms	4 ms
Display Average Response Time	8 ms	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	1.54 in 3.9 cm 39 mm 0.13 ft	2.13 in 5.4 cm 54 mm 0.18 ft
Case Weight	3.37 kg 7 lbs	4.3 kg 9 lbs
Case Width with Stand	21.2 in 53.9 cm 538.5 mm 1.77 ft	24.01 in 61 cm 609.9 mm 2 ft
Case Height with Stand	13.72 in 34.8 cm 348.4 mm 1.14 ft	17.85 in 45.3 cm 453.3 mm 1.49 ft
Case Depth with Stand	6.5 in 16.5 cm 165 mm 0.54 ft	7.35 in 18.7 cm 186.8 mm 0.61 ft
Case Weight with Stand	5.32 kg 12 lbs	5.2 kg 11 lbs
Case Color	Black	Black, Silver
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.1 (Type-C; upstream; DP; 65W) 1 x Ethernet RJ45 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out 1 x DisplayPort 1.4 (Output MST) 1 x HDMI 1.4 2 x USB 3.0 (downstream) 2 x USB 3.0 (downstream; BC 1.2)	2 x HDMI 1.4 1 x 3.5 mm Audio Out
Audio
Features
Cool Features	Flicker-free technology Low Blue Light	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features	Security lock slot	Anti-theft stand lock slot - Kensington S2721HN - silver S2721NX - black
Ergonomics
Case Width	21.2 in 53.9 cm 538.5 mm 1.77 ft	24.01 in 61 cm 609.9 mm 2 ft
Case Height	12.35 in 31.4 cm 313.7 mm 1.03 ft	14.31 in 36.4 cm 363.6 mm 1.19 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	No
Height Adjustment Range	130 mm 13 cm 5.1181 in 0.4265 ft
Landscape or Portrait Pivot Support	Yes	No
Left Pivot	90 °
Right Pivot	90 °
Left or Right Swivel Support	Yes	No
Left Swivel	40 °
Right Swivel	40 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	56 Hz - 76 Hz	48 Hz - 75 Hz
Horizontal Digital Frequency	30 kHz - 83 kHz	30 kHz - 83 kHz
Screen Interpolation Measurement Unit	NULL	NULL
Accessories
Extras	DisplayPort cable USB Type-C to Type-C cable	HDMI cable
Certificates and Standards
Licenses	ENERGY STAR EPEAT TCO Certified RoHS NFPA 99	ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light
Usage and Storage Requirements
Safe Operating Temperature Level	0 °C - 40 °C 32 °F - 104 °F	0 °C - 40 °C 32 °F - 104 °F
Safe Operating Humidity Level	10 % - 80 %	10 % - 80 %
Internal Storage Temperature	-20 °C - 60 °C -4 °F - 140 °F	-20 °C - 60 °C -4 °F - 140 °F
Internal Storage Humidity	5 % - 90 %	5 % - 90 %
Max Operating Altitude	5000	5000
Max Storage Altitude	12192	12192

Dell U2421HE

Dell S2721HN