Portable displays that you pair with a laptop aren't a new phenomenon, but in the past couple of years, they have come into their own. Many of the major monitor manufacturers have at least one in their repertoire, and new models are appearing more regularly than ever. Whether you want to add a second screen for giving presentations to small groups, view two programs open full-screen at once, enhance your portable gaming system, or touch up your designs with a stylus, mobile monitors of different sizes, styles, and paradigms are ready to serve.
Why all of these panels, all of a sudden? The widespread adoption of USB Type-C connectivity—with its ability to transfer power, data, and video over a single cable—has been a godsend for the growth of portable displays. They no longer need a dedicated AC adapter for juice (though some do come with one as an option), and many have just a single USB-C port that handles all the connectivity, though some add HDMI or other connectors.
ViewSonic's VG1655 ($184.99) is a cleverly designed portable monitor with some uncommon features. It offers a fold-out stand with a wide tilt range. A five-way mini-joystick controller takes the place of the fidgety buttons found on most mobile monitors, and the onscreen display (OSD) menu system lets you access a wealth of settings instead of the handful offered by many rival panels. And it has two USB-C ports—one for power and one for data/video transfer—plus a mini HDMI port. Its poor sRGB color-gamut coverage makes it best for working with text and spreadsheets (versus photos and video), but it shines brighter than most mobile panels. Its surprising wealth of features, including built-in speakers, makes it our latest portable-monitor Editors’ Choice, despite its par-for-the-course panel.
Sold via Amazon, the $199.99 Lepow C2S is a 15.4-inch portable monitor. (A 15.6-inch version is also available.) It's a worthy second screen for a laptop in the 14-to-16-inch range, with a generous port selection and a fold-out stand. Although it's not the brightest mobile display around, the color coverage is quite good for a budget panel, and it does well in rendering photos and video. The C2S is a bit thicker than many portable monitors, but takes advantage of its extra depth to offer more features. It's our new Editors' Choice award winner among budget-priced mobile displays.
You need not be limited by your laptop's single small screen if you're drafting a proposal in your hotel room or presenting to a small group anymore: The age of the truly mobile monitor is here. You can boost your screen area with a portable display such as the AOC I1601FWUX USB-C Portable Monitor ($199.99), a 15.6-inch 1080p monitor that weighs less than two pounds and rests on a sturdy, foldable stand. Note that I1601FWUX is best for business use rather than entertainment, because its colors are on the dull side. Also, it connects via USB-C only, and your laptop's USB-C port needs to support the DisplayPort-over-USB protocol. But if your laptop fits the profile, it's a sleek second-screen solution, requiring just that single cable connection for signal and power.
Incorporating strengths from previous Asus portable monitors including the Editors' Choice award-winning ZenScreen Touch (MB16AMT), while adding gaming-centric features like a high refresh rate and Nvidia G-Sync compatibility, the Asus ROG Strix XG16AHPE ($399) is a formidable, well-rounded portable display for gamers and multimedia buffs. Although it has a premium price for a 15.6-inch mobile monitor, it's crammed with features such as a built-in battery, speakers, and kickstand, as well as an included soft carrying sleeve. It did well in our brightness and contrast testing, and its excellent sRGB color coverage makes it a good choice for viewing photos and video. The ROG Strix earns an Editors' Choice nod as an excellent portable monitor if you're looking for one on the larger side.
The Optix MAG161V, MSI's first portable gaming monitor, lacks the signature gaming features of the company’s desktop monitors: a high peak refresh rate, adaptive-sync support, RGB lighting, and a mini-joystick-style menu controller, to name a few. But its inclusion of both USB Type-C and mini-HDMI ports lets you connect it with most any gaming console and many smartphones, in addition to computers. That means you can use it as a good primary gaming screen, or as a second panel for enhancing your productivity, whether at home or on the road. It’s also one of the few portable monitors with built-in stereo speakers. Otherwise, its native resolution, screen size, refresh rate, color quality, and brightness are typical of today's crop of portable panels: which is to say, all of a piece. It's solid, but it doesn't stand out.
Two things set the $349.99 Asus ZenScreen Touch (MB16AMT) apart from most every general-purpose mobile monitor we have reviewed. First, it has a touch screen, a feature that it shares with some interactive pen monitors like the Wacom Cintiq 16. Second, it has a built-in battery that recharges, which can be a godsend if you're viewing content from your phone, or if your laptop's battery is low on juice. This 15.6-inch display, which is best for use with Windows computers and Android phones, is feature-rich and a joy to use, and it's our new Editors' Choice for mobile monitors in its size range. It's not cheap, but it's very capable.
Lenovo's $249 ThinkVision M14 joins a small but growing group of portable, small-screen monitors designed to be paired with laptops for folks on the go, acting as a second screen. Thanks to its easy portability and high-quality panel, the M14 is a good choice for businesspeople or consumers who have a laptop with a USB Type-C port that supports DisplayPort video out. It doesn't have the range of controls of the recently reviewed HP EliteDisplay S14, but it is bright, features high color fidelity, can be tilted to a wide range of angles, and is very light and easy to transport. It earns a PCMag Editors' Choice, our first for a portable monitor.
The $219 HP EliteDisplay S14 has some impressive specs for a portable monitor, though the niftiest of all boils down to one letter: "C." This business-oriented travel monitor has a full HD (1,920-by-1,080-pixel) native resolution, using a 60Hz panel with a 5ms response time. The listed static contrast ratio of 700:1 is nothing to write home about, but it uses an in-plane switching (IPS) panel, not the lesser TFT LCD you might expect. And it's powered—video signal and juice alike—solely by a USB Type-C port. If you have a late-model laptop that supports DisplayPort over USB-C, this is an ideal second-screen companion that will double your desktop space wherever you travel, and be easy on your eyes (and shoulders) while doing it.
The $649.95 Cintiq 16, which Wacom refers to as a "creative pen display," lets an artist draw, navigate menus, and click buttons on its 15.6-inch screen using the included Wacom Pro Pen 2 stylus. It's an interactive monitor, attaching to a computer rather than running its own resident programs as would a tablet. The Cintiq 16 lacks some screen features and connectivity choices found on the Cintiq Pro 16(Opens in a new window)—not to mention its gesture-based touch control—but it comes in at a price that's far more suitable for art students, amateur designers, and professionals on tight budgets.
The $299.99 Asus ZenScreen Go (MB16AP) offers a sensible solution for powering a mobile monitor where outlets may be scarce, or when your laptop or phone is underpowered or low on juice: a built-in battery of its own. This 15.6-inch panel, which can connect to a phone or laptop over a USB-C port, can provide up to 4 hours of juice when you most need it. It's a good, lower-priced alternative to the Asus ZenScreen Touch (MB16AMT)—which also packs a rechargable battery—and includes features such as a comprehensive but easy-to-navigate onscreen display (OSD), a 1080p IPS screen, a foldable stand, and a pen that serves as a makeshift stand.
The Bottom Line: The 15-inch espresso Display looks gorgeous and has exceptional color coverage for a portable display. You'll have to pay extra for its stand and the stylus for its touch screen, though.
The 15-inch espresso Display ($349 for the panel alone) is a portable touch-screen monitor like no other. Its thin, uncannily flat anodized frame is a triumph of industrial design, and its coverage of the sRGB color space is the best we've seen among similar products. It is unusual, though, among mobile monitors in that it doesn't include a stand or a protective sleeve or case—the manufacturer, espresso Displays, offers a couple as accessories—and it lacks a stylus. Most or all are usually bundled with portable touch-screen panels. The full-package price therefore really adds up. Still, it could make a great showpiece for on-the-go presenters driven to impress, and you're bound to be happy with its image quality.
The most unusual portable monitor we have come across is the SideTrak, by Stand Steady. This 12.5-inch display, housed in a framework that attaches magnetically to the back of a laptop, in effect becomes a part of your computer although it can be removed at will. It's a clever and appealing approach to carrying around a second, portable display, but it couldn't match the color range or brightness of the Lenovo ThinkVision M14, our Editors' Choice portable monitor for small laptops.
Many smaller desktop displays can be taken on the road in a pinch, but "true" portable monitors are those specifically sold as such. Even those range quite a bit in size: from 3.5 inches to 22 inches. Portable displays run the gamut from personal, business, and general-purpose models to panels for artists and gamers.
The sweet spot for use with a laptop, though, and our focus here, is between 12 and 17 inches. Many users match their portable display with the screen size of their laptop. But also on the market is a handful of models at 10 inches (mostly for use with gaming consoles) and at 7 inches (for use with the Raspberry Pi).
Most portable displays use a stand consisting of a thin but stiff plastic board, with several grooves or creases on which it folds. At one end is a magnetic strip, which adheres to the back of the monitor at its top. Folding the sheet in the middle, with the angle pointing away from the user, props up the monitor. The bottom of the monitor inserts into a groove, securing it and tilting the device upward. (Some portable displays have several grooves, and you can alter the monitor's tilt angle by placing the base in a different one.)
These foldable stands often double as protective covers for the display when it's not in use. Some protect just the front of the monitor, while others are larger, wraparound covers that sandwich the entire monitor.
Another stand design that we have seen consists of a rigid, flat base, containing the ports, to which the screen is attached via hinges. You can set the screen at any angle you like simply by tilting it. This kind is much less common, though. Also, a few designs use the laptop itself as the support, fastening to its back or its side and sliding or swinging out for use.
Although mobile monitors lack the height, pivot, or swivel adjustability of their desktop counterparts, they are small and light enough that they are easy to adjust manually. Some monitors can be pivoted by hand, though not all stands can support a monitor when it is in portrait mode. In those cases, you could always prop up the monitor against a wall or other surface. Most portable monitors can automatically correct the image so it is always right side up, whether you're in landscape or portrait mode. (Even in those that lack such automatic image rotation, you can change the orientation in Windows display settings.)
When we're looking at the panels for mobile monitors, the main factors we evaluate are the screen size, the native resolution, the brightness range, the technology the panel uses, and the maker's claims for color-gamut coverage.
Many users prefer to use a mobile monitor that has the same screen size and native resolution as the laptop screen they are using it with. That said, I have found these panels to be forgiving and have had no trouble running portable displays that are slightly larger than my laptop's own screen. As long as you don't mismatch the mobile monitor's and laptop's screen aspect ratio (which, almost always, is a normal 16:9 widescreen ratio), you are unlikely to experience much trouble in matching them up.
The native resolution on panels suitable for use with a laptop ranges from 1,366 by 768 pixels up to 3,200 by 1,800 pixels (QHD+). Most of the recent laptop-appropriate screens sport a native resolution of 1,920 by 1,080 pixels (aka 1080p, or "full HD"), but a few go higher.
Mobile monitors tend to be dimmer, at their maximum brightness levels, than their desktop counterparts. What is commonly called brightness is actually luminance, or brightness per unit area. Portable monitors tend to cluster around 180 nits (also expressed as "candelas per meter squared") in our testing, even though many are rated at between 230 and 300 nits, which is fine for typical use. The highest we have measured at this writing is 280 nits.
Monitors that make use of in-plane switching (IPS) technology are generally preferred for general use over vertical-alignment (VA) and twisted-nematic (TN) panels due to their wider off-axis viewing angles and good color accuracy. Many recent mobile monitors are IPS, but there's a catch. When we test a panel for its color gamut, we first test the sRGB color space, which is the default color space for the web and many other applications. This color space comprises essentially all the colors that can be made by mixing red, green, and blue. Most desktop monitors cover at least 95 percent of sRGB, and we have seen portable monitors attain similar coverage. However, since late 2017, a spate of mobile IPS monitors have shown much more limited overall color coverage (60 to 72 percent of sRGB) and very similar color profiles—indicating poor red and purple coverage and slightly enhanced blue-greens. Because of their nearly identical "color signatures," we assume that these screens come from the same or similar sources, although they are on monitors made by a variety of manufacturers.
These measured results have been borne out in our experiential testing, where in photos and videos red and purple areas tended to look dull and washed out. Although screens with this issue are fine for most business and productivity use, they are subpar choices for videophiles or photo enthusiasts. In our monitor reviews, we include a chromaticity chart that maps our readings against the ideal readings for the color space being tested, and provide an analysis of the panel's color coverage.
As I alluded to earlier, the mobile-monitor world is undergoing a convergence of power and connectivity thanks to USB Type-C connectivity. Many USB-C ports support both DisplayPort over USB and USB power delivery, letting both data/video and power flow through the port from a computer over a single USB cable. Most new mobile monitors have at least one USB-C port, and some connect solely via USB-C. While this simplicity has its appeal, be sure that your laptop's USB-C port supports data, video, and power transfer, because some early-generation USB-C ports don't. (Thunderbolt 3 ports should also work fine; their functionality encompasses all of that of USB-C.)
A few mobile monitors use traditional power adapters. This is particularly true of models that work with sketch pens and intended for artists, which are in effect interactive monitors. In a common configuration, the display draws power through an adapter, while two cables connect to the computer. One is HDMI, to handle transfer of the image displayed on the device, and the other is USB (through a USB-A port), to record the pen motions the user makes when drawing on the interactive display. HDMI (usually in the form of mini-HDMI) is also a common port (the most common other than USB-C) on more conventional portable displays.
A few older portable-display models draw their power from a laptop over a separate USB 3.0 connection, but USB-C is well on its way to making this kind of connection passé.
Nearly all portable displays are plug-and-play and require no software to operate. Any utilities offered, usually supplied on disc and/or through download, will be for specific functions, such as the ability to enable the screen image to remain upright when you switch between landscape and portrait orientation. Sometimes, the display may come with a utility that lets you change monitor settings from your computer screen rather than through the secondary panel's onscreen display (OSD) controls.
The OSD is the monitor's menu system, governing user-controllable settings such as brightness, contrast, color levels, picture mode, and aspect ratio. It is often arranged in several submenus. Although a few models include several buttons to use in navigating the OSD, a single button or switch to control it is more common.
In general, audio is not a consideration with mobile monitors, as these devices tend to lack built-in speakers or audio jacks. The few portable displays (often gaming models) that do include speakers, in our experience, have weak ones, and are most useful when paired with a portable gaming console or a smartphone. When the monitor is connected to a laptop, you can always switch from the display's speakers to your laptop's speakers by clicking (in Windows) the speaker icon in the taskbar and changing to your laptop's audio.
Whatever your needs or budget, there's a model out there that's right for you; the key thing is to consider the primary display panel that you'll be using alongside of it. Below, check out the current best portable displays we've tested. We update this story regularly, but for the very latest monitor reviews we've posted, also see our monitor product guide.
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