Comparison between Dell U2421E vs Dell S2721HS

General Info
Model Number	Dell U2421E	Dell S2721HS

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2020	2020
Brand	Dell	Dell
Model Number	U2421E	S2721HS
Alias		S2721HSX
Display
Screen Size Class	24" (inches)	27" (inches)
Diagonal Size	24.06 in 61.1 cm 611 mm 2 ft	27 in 68.6 cm 685.891 mm 2.25 ft
Screen Width	20.41 in 51.8 cm 518.4 mm 1.7 ft	23.54 in 59.8 cm 597.89 mm 1.96 ft
Screen Height	12.76 in 32.4 cm 324 mm 1.06 ft	13.24 in 33.6 cm 336.312 mm 1.1 ft
Display Type	IPS	IPS
Display Bit Depth	8 bits (6 bits + FRC)	8 bits
Frame Rate Control	Yes
Max Number of Colors	16777216	16777216
Bits	24	24
Screen Aspect Ratio	16:10	16:9
Screen Resolution	1920 x 1200	1920 x 1080
Screen Pixel Pitch	0.275 mm	0.311 mm
Screen Pixel Density	94 ppi	81 ppi
Screen-to-Body Ratio	100.87 %	90.67 %
Backlight Source	W-LED	W-LED
sRGB	99 %
NTSC 1953		72 %
Screen Brightness	350 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	4 kg 9 lbs	4.3 kg 9 lbs
Case Width with Stand	20.9 in 53.1 cm 530.8 mm 1.74 ft	24.01 in 61 cm 609.9 mm 2 ft
Case Height with Stand	14.33 in 36.4 cm 364 mm 1.19 ft	15.71 in 39.9 cm 399 mm 1.31 ft
Case Depth with Stand	6.81 in 17.3 cm 173 mm 0.57 ft	6.88 in 17.5 cm 174.7 mm 0.57 ft
Case Weight with Stand	6.1 kg 13 lbs	6 kg 13 lbs
Case Color	Black	Black, Silver
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.2 (Type-C; Gen 1; upstream; 90W; DP Alt Mode) 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 4 x USB 3.2 (Type-A; Gen 1; downstream; 2x BC 1.2) 1 x USB 3.2 (Type-C; Gen 1; downstream; 15W)	1 x 3.5 mm Audio Out 1 x HDMI 1.4 1 x DisplayPort 1.2
Audio
Features
Cool Features	Easy Arrange Flicker-free technology Low Blue Light Infinity Edge design ComfortView Plus Dell Display Manager	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features	Security lock slot	Anti-theft stand lock slot - Kensington S2721HS - silver S2721HSX - black
Ergonomics
Case Width	20.9 in 53.1 cm 530.8 mm 1.74 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	Yes
Height Adjustment Range	150 mm 15 cm 5.9055 in 0.4921 ft	110 mm 11 cm 4.3307 in 0.3609 ft
Landscape or Portrait Pivot Support	Yes	Yes
Left Pivot	90 °	90 °
Right Pivot	90 °	90 °
Left or Right Swivel Support	Yes	Yes
Left Swivel	45 °	30 °
Right Swivel	45 °	30 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	60 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-A cable USB Type-C to Type-C cable	HDMI cable
Certificates and Standards
Licenses	ENERGY STAR EPEAT Golf TCO Certified TUV Rheinland Low Blue Light Certified	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 U2421E

Dell S2721HS