Check your USB-C port first
The simplest setup is one USB-C cable carrying both picture and power. That only works if the port supports video, called DisplayPort Alt Mode. Thunderbolt and USB4 ports always do; plain USB-C ports on budget laptops sometimes only handle data and charging. Look for a small display or Thunderbolt symbol next to the port, or check the laptop's specifications. If your port cannot carry video, every monitor in this guide also has an HDMI input, and you power the screen separately through USB-C.
Size, resolution and refresh rate
**15.6 to 16 inches, 1080p**: the standard size. It fits in a laptop bag alongside a 14 or 15-inch laptop, and 1080p is sharp at this size. **18.5 inches**: noticeably more room for spreadsheets and side-by-side windows, but heavier and bulkier. Best for a second desk or occasional travel. **60Hz vs 144Hz**: 60Hz is fine for documents, video calls and video. 144Hz makes games and scrolling smoother and is worth it only if you game on the screen.
Best budget portable monitor: MNN 15.6-inch
A 1080p IPS screen with one-cable USB-C and HDMI inputs and a folding smart case, backed by more than 12,000 ratings. It covers the core job of a second screen for email, documents and video calls at the lowest cost. Like most budget models it is dimmer than a good laptop screen, so it is best used indoors.
Best brand-name pick: ASUS ZenScreen MB16ACV
A 15.6-inch 1080p IPS panel with an anti-glare surface, a built-in kickstand and a three-year warranty, which is unusual in a category where one year is typical. Picture quality is in line with good budget panels; you pay extra for build quality, the kickstand and ASUS support. The AOC 16T20 is a cheaper option from another established monitor maker.
Best for gaming: ARZOPA Z1FC 144Hz
A 16.1-inch 1080p panel running at 144Hz, with a kickstand and HDR support. The higher refresh rate suits gaming laptops, handheld PCs and consoles that output above 60 frames per second. For office work, a 60Hz model does the same job for less.
Laptop screen extenders: when two extra screens make sense
A screen extender such as the KYY X90D clips to the back of the laptop lid and slides out two 15.6-inch screens, turning one laptop into a three-screen workstation. It suits traders, analysts and remote workers who need maximum screen space wherever they work. Check three things first: your laptop size must be within the supported range, the extender adds real weight to the lid, and some models need a display driver installed to run both screens over one cable.
Power, brightness and stands
**Power**: over one USB-C cable the laptop powers the monitor. At high brightness, or with a laptop that limits USB-C power, plug a USB-C charger into the monitor's second USB-C port. **Brightness**: most budget portable monitors are dimmer than a laptop screen. Avoid working next to a bright window or in direct sun. **Stands**: folding case stands are light but less stable; built-in kickstands are steadier. VESA mounting holes, found on models such as the cocopar, AOC 16T20 and VisionOwl, let you put the screen on a monitor arm at home.