Does this Dell monitor support ergonomic adjustment and mounting options?

Yes. The product description says it supports swivel, slant, height, and tilt adjustments, and it is VESA mount compatible.

What is the monitor’s native resolution and aspect ratio?

The monitor has a native resolution of 3440 x 1440 (UWQHD) with a 21:9 aspect ratio.

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Main image of Dell Pro P P3426WEB 34" Class Webcam UW-QHD Curved Screen LED Monitor - 21:9 - 34.1" Viewable - In-plane Switching - LED Backlight - 3440 x 1440 - 350 Nit - 5 ms - DELL-P3426WEB

Alt view image 2 of 4 - Dell Pro P P3426WEB 34" Class Webcam UW-QHD Curved Screen LED Monitor - 21:9 - 34.1" Viewable - In-plane Switching - LED Backlight - 3440 x 1440 - 350 Nit - 5 ms - DELL-P3426WEB

Alt view image 3 of 4 - Dell Pro P P3426WEB 34" Class Webcam UW-QHD Curved Screen LED Monitor - 21:9 - 34.1" Viewable - In-plane Switching - LED Backlight - 3440 x 1440 - 350 Nit - 5 ms - DELL-P3426WEB

Alt view image 4 of 4 - Dell Pro P P3426WEB 34" Class Webcam UW-QHD Curved Screen LED Monitor - 21:9 - 34.1" Viewable - In-plane Switching - LED Backlight - 3440 x 1440 - 350 Nit - 5 ms - DELL-P3426WEB

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Dell Pro P P3426WEB 34" Class Webcam UW-QHD Curved Screen LED Monitor - 21:9 - 34.1" Viewable - In-plane Switching - LED Backlight - 3440 x 1440 - 350 Nit - 5 ms - DELL-P3426WEB

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34.1" Viewable
In-plane Switching (IPS) Technology
LED Backlight
3440 x 1440
1.07 Billion Colors
350 Nit
5 ms
Speakers
Swivel, Slant, Height, Tilt
USB Type-C - HDMI - DisplayPort
VESA Mount Compatible
USB Hub, KVM Switch

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Model
Brand	Dell
Part Number	DELL-P3426WEB
Cabinet Color	Black

Display
Screen Size	34"
Widescreen	Yes
Maximum Resolution	3440 x 1440
Resolution	3440 x 1440 (UWQHD)
Refresh Rate	100Hz
Display Colors	1.07 Billion
Brightness	350 cd/m2 (nit)
Contrast Ratio	1500:1
Aspect Ratio	21:9
Response Time	5ms
Panel	IPS
Curved Surface Screen	Yes

Connectivity
HDMI	Yes
DisplayPort	Yes

Additional Information
First Listed on Newegg	September 11, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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Return for refund within: 30 days
Return for replacement within: non-replaceable
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Item#: 9SIBDCWM6A0153