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Most portable monitors are inexpensive, but this is often reflected in their quality. We’ve noticed a wide range of build quality, design, and image quality among portable monitors that retail below $150. It’s possible to find a great portable monitor on a tight budget, but we recommend sticking to models tested by a professional reviewer.A handful of portable monitors, such as the Viewsonic ColorPro VP16-OLED, are priced above $300. These rare models back up their price with special features such as a top-notch OLED panel or built-in battery. Paying extra for a quality monitor is worthwhile,

The Dell Ultrasharp U3225QE checks all the boxes for a great 4K monitor. The 31.5-inch 4K IPS Black panel features excellent color accuracy and an above-average contrast ratio, has a 120Hz refresh rate for enhanced responsiveness, and sports generous connectivity options that eliminate the need for any external adapters or hub. It also has an ergonomic stand and anti-glare coating for comfortable viewing in all lighting conditions.

The Dell S2722QC offers 4K, USB-C, HDR, and integrated speakers, making it a good everyday productivity monitor for an affordable price.

HDMI 2.1 is only important if you want to connect a PlayStation 5 or Xbox Series X game console at 4K resolution and play titles with 120Hz support. These consoles only support HDMI output, so an HDMI connection is your only option.Most desktop PCs and laptops also have a DisplayPort output. This is preferable to HDMI 2.1 because it supports higher resolutions and refresh rates, so HDMI 2.1 is not necessary to connect a PC.