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Connect the monitor to power and to a compatible video port, then choose how the screens should work in your operating system. On Windows, open Settings > System > Display; on a Mac, open Apple menu > System Settings > Displays. Choose Extend for separate desktop space or Duplicate/Mirror to show the same content on both screens. The exact cable, adapter, dock and number of supported displays depend on your computer model.
Before you connect: check ports and display support
Turn on the monitor and connect a video cable between it and the computer or a compatible dock. Make sure both ends are firmly seated. If the computer and monitor do not have matching ports, you may need a compatible adapter or a cable with the right connectors. Apple describes this option for Mac displays in its external display instructions.
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Do not assume that a port or dock will support video just because its connector fits. Check the specifications for your exact computer model, as well as the monitor and any dock or adapter, for supported external-display count, resolution and refresh rate. A basic splitter duplicates one video signal; it does not create two independent extended desktops. Microsoft’s display troubleshooting guidance discusses output and accessory compatibility.
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Set up a second monitor in Windows 11 or Windows 10
- Connect and power on the monitor. Attach its video cable to the PC or a compatible dock, then confirm both ends are secure.
- Open display settings. Go to Start > Settings > System > Display. If Windows recognizes multiple screens, numbered display icons appear. Select Identify to show the number on each screen. See Microsoft’s guide to using multiple monitors.
- Choose a display mode. Press Windows key + P and select Extend for separate desktop space across the monitors. Choose Duplicate to show the same content on both. PC screen only and Second screen only are the other options.
- Arrange the screens. In Display settings, drag the numbered icons to match the monitors’ real positions, then select Apply. Move the pointer across the edge to check that it passes to the screen you expect.
- Set resolution and scale if needed. Select a display and begin with its recommended resolution. Adjust resolution or scale per screen if text or items look too small or large.
If the second monitor is connected but does not appear, expand Multiple displays in Display settings and select Detect. For a wireless display, use Connect under Multiple displays; Windows key + K opens Cast for a wireless display adapter.
#1 Best Overall
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MNN 15.6" FHD 60Hz Portable Monitor USB-C HDMI IPS HDR Gaming Laptop | 15.6" FHD IPS HDR, USB-C one-cable, PC/Mac/Phone/Switch, Smart Case,Laptop , low blue, work&game
- Full HD Portable Monitor - MNN 15.6inch portable laptop monitor with 1920*1080 resolution, advanced IPS glossy screen support 178° full viewing angle, it renders accurate and bright color, draws you into the video or game with lifelike colors and amazing detail.It can effectively reduce blue light radiation damage, no flickering, eye-care, and make it easier to watch for a long time.A second monitor for working from home.
- Double Type-C Port -For Plug & Play, the MNN monitor provides 2 Full Feature Type-C ports. Only One USB Type-C Cable is required to connect to the power supply & display signal transmission. NOTE: Your device should support thunderbolt 3.0 or USB 3.1 Type C DP ALT-MODE.which supports multiple connect ways to your laptops, PC, Phones, Macbooks, PS5/PS4, Xbox, and Switch.
- Lightweight Ultra Slim for Travel - As a portable external monitor,MNN portable laptop monitor easily accommodate to every suitcase and backpack and stress-free when you are holding it for a long time. They are truly portable computer monitors for travelers, students, gamers,engineers, and everyone.
- Give consideration to work and games - through multiple display modes [Copy Mode/Extended Mode/Second Screen Mode/Portrait Mode], we can bring you a clear second screen in the meeting, and expand the screen anytime and anywhere to improve work efficiency and improve the quality of life. Adjusting to HDR mode can upgrade the image to a new level, providing you with brighter highlights,deeper and more realistic colors, more realistic images, and amazing viewing/gaming experience.
- Powerful Smart Cover - MNN portable external monitor can work in both landscape and portrait mode, can be used as a gaming monitor, screen extender for laptop or phone. Comes with a scratch-proof smart cover made of durable PU leather exterior, doubles as a stand, provides comprehensive protection for this portable computer monitor.
Set up a second monitor on a Mac
- Connect and power on the display. Connect its video cable to the Mac. HDMI and Thunderbolt are examples of ports used for external displays. If the cable needs a port the Mac lacks, use a compatible adapter or a cable with a connector that fits the Mac.
- Open display settings. Choose Apple menu > System Settings > Displays. A correctly powered and connected display should be detected automatically. Apple’s instructions for connecting a display cover compatible connections and available settings.
- Choose extending or mirroring. In Displays, use Use as to select an extended desktop or mirroring where that option is available. The choices shown depend on the Mac and connected display.
- Arrange screens and choose the primary display. Use the arrangement controls to position the displays as they sit on your desk. Select the primary display if you want menus and other primary-screen elements on a particular monitor. Start with the default or recommended resolution; available resolution and refresh-rate settings vary by setup.
The number of external displays a Mac can use at once depends on its model and the connected displays’ resolution and refresh rate. Check the specifications for the exact Mac rather than assuming all models support the same setup.
Extend, duplicate or mirror: which should you choose?
| Mode | What appears | Use it when |
|---|---|---|
| Extend | A separate desktop area across screens | You want more workspace, such as keeping a document open on one screen while working on another. |
| Duplicate or mirror | The same content on both screens | You want another person to see the same screen, such as during a presentation. |
On Windows, choose between these modes with Windows key + P or Display settings. On macOS, use Use as in Displays when the relevant choice is available.
Rank #2
Anyuse 15.6" FHD IPS USB-C HDMI Portable Monitor | 1080P 60Hz FHD, IPS, Ultra-Slim ,USB-C/HDMI, Second External Monitor, for PC/Mac/Phone/PS/Xbox/Switch
- 15.6" FHD Portable Monitor - Featuring a 1920*1080P resolution, 178°FULL viewing angle, HDR, and Low Blue Light Super Clear IPS A-grade screen, this Anyuse portable screen for laptop enhanced visual experience, reduces eye strain and fatigue.
- Double Type-C Port -For Plug & Play - Anyuse portable monitor features 2 full-featured Type-C ports and 1 MINI HDMI port. You can easily access your favorite devices with just one USB Type-C or MINI HDMI cable. NOTE: Your device should support Thunderbolt 3.0/4.0 or USB 3.1 Type C DP ALT-MODE.
- Portable & Light Weight - At just 1.37lbs and 0.04 inch thin, this portable laptop monitor is ultra-portable and perfect for on-the-go productivity or gaming. flexible to use anywhere you need a second screen for laptop. bringing you efficiency for meetings, work from home, and presentations.
- Able to Balance Work and Play - With multiple display modes [copy mode/extension mode/second screen mode]. During meetings,it can copy your laptop's content as a second screen to share with others.At work, it can be used as a second extended screen to increase productivity. In life, adjusting to HDR mode can upgrade the image to a new level, providing you with brighter highlights, more realistic colors and images.Two built-in speakers provide an amazing viewing and gaming experience.
- Wide Compatibility - Enjoy hassle-free plug-and-play functionality with the portable monitor. it is compatible with all devices equipped with HDMI and USB Type-C ports like laptops, PS, XBOX, SWITCH game consoles, No app or driver installation required.
Fix a second monitor that is not detected
- Check power and connections. Confirm the monitor is on, select the correct input on the monitor if applicable, and reseat the cable at both ends. Verify that the cable and any adapter match the ports and support the display connection.
- Use the operating system’s detection option. In Windows, go to Settings > System > Display, expand Multiple displays, and select Detect. On Mac, open System Settings > Displays, hold Option to reveal Detect Displays, then select it. Apple’s display troubleshooting steps also recommend checking connections and reconnecting the display.
- Test a simpler connection. Disconnect docks, dongles and adapters temporarily, then see whether the monitor works directly with the computer. Microsoft’s troubleshooting guidance notes that accessories can cause conflicts.
- Reconnect after sleep and wake. On a Mac, unplug and reconnect the display cable; if it remains missing, put the Mac to sleep and wake it, then check Displays again.
- Verify hardware limits. Consult the computer maker’s specifications and the monitor or dock documentation. A computer’s graphics hardware may limit the number of displays or the resolutions it can drive. If the computer has only one video output, a compatible dock or USB video adapter may be an option, but confirm model compatibility before buying.
Windows 10 support status
Windows 10’s monitor setup steps remain documented by Microsoft, but its support status has changed. Microsoft Support states that after October 14, 2025, it no longer provides free Windows Update software updates, technical assistance or security fixes for Windows 10. This end of support does not itself disable monitor setup; it concerns Windows 10 updates, assistance and security fixes.
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cocopar Portable Monitor 15.6 Inch 1080P FHD 60Hz 85% sRGB Travel Monitor with Speaker HDMI USB-C Second Screen for Laptop MacBook Surface PC Xbox PS4/5, VESA Mountable, with Cover Stand
- Portable Monitor for Laptops: Cocopar laptop screen extender is the ideal portable monitor for Macbook, Surface Pro, Surface Laptop, Lenovo Laptop, HP Laptop, Dell Laptop, ASUS Laptop, etc. This second monitor for laptop supports Extend and Mirror Mode, bringing you efficiency for meetings, work from home, and presentations
- Plug and Play USB-C Monitor: Cocopar portable laptop monitor provides 2 Full-featured USB-C ports and a HDMI port, is compatible with most laptops, PC, PS4, and Xbox. Only One single USB-C Cable is required for both power supply and display and supports power pass-through reverse charging. NOTE: Your device should support thunderbolt 3.0/4.0 or USB 3.1 Type C DP ALT-MODE
- FHD Portable Monitor VESA Mountable: Featuring a 1080P resolution, 60 HZ, 85% color gamut, 178° FULL viewing angle, HDR, and Low Blue Light Super Clear IPS A-grade screen, this Cocopar 15.6 inch portable screen for laptop with two VESA holes can be easily and stably mounted on a stand for landscape and vertical mode for high productivity
- Portable and Light Weight: Cocopar travel monitor for laptop is the ideal companion for all your business trips and home office. Measures only 4mm (0.2 inches) at the slimmest point and 1.5 lb without the magnetic cover (2.4 lb with cover). Coming with a Smart Stand Case, this travel monitor is well-protected and flexible to use anywhere you need a second screen for laptop
- Your Go-To Screen Anywhere: Perfect for remote work, business trips, virtual meetings, gaming, and content creation. Cocopar delivers flexible dual-screen convenience wherever you are.
Rank #4
KYY Portable Monitor 15.6" 1080P Computer Monitor Screen Extender w/Cover | Portable Monitor for Laptop 1080P FHD IPS with USB-C and HDMI, Laptop Screen Extender for Travel HDR Gaming Monitor w/Speaker
- [ FHD 1080P PORTABLE MONITOR ]: KYY using a 15.6''(8.8"x14.2") advanced IPS screen with 178° wide viewing angle, Delivers 1920*1080 breathtaking viewing quality and HDR technology, KYY portable gaming monitor has excellent color rendering ability, provide you the clearer, smooth, excellent performance in gaming/multimedia. It can effectively reduce blue light radiation damage, no flickering, eye-care, and make it easier to watch for a long time
- [ WIDE COMPATIBILITY ]: KYY portable monitor for laptop equipped with 2 Full Function Type-C ports and Mini-HDMI port, easy access to your favorite devices with 1 cable solution as long as your device support Thunderbolt 3 or 3.1 USB-Type-C, compatible with most laptop, smartphone, PC, PS4, XBOX and more.
- [ ULTRA-SLIM PORTABLE DISPLAY ]: KYY USB C portable monitor features a 0.3inch ultra-slim profile(1.7lb), it is easy to slides into your bag, allows you to carry it everywhere, ideal for a simple on-the-go dual-monitor setup or extend your phone screen for movies or games. No driver needed and equipped with 3.5mm audio inputs and 2 built-in stereo speakers to enhance entertainment experience
- [ DURABLE SMART COVER ]: Comes with a scratch-proof smart cover made of durable PU leather exterior, doubles as a stand, provides comprehensive protection and frameless magnetic design for this portable computer monitor. There are two grooves in the cover base to give at least some choice of viewing angle for your comfort for less cumbersome installation
- [ LIGHTWEIGHT BUT POWERFUL ]: KYY portable external monitor can work in both landscape and portrait mode, can be used as a gaming monitor, screen extender for laptop or phone. It has a unique designed Premium gray metal appearance, 2 built-in speakers to play audio, a friendly menu control wheel for setting, and 24/7 professional support team
Rank #3
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InnoView Portable Monitor, 15.6 Inch FHD 1080P HDMI USB C Second External Monitor for Laptop, Desktop, MacBook, Phones, Tablet, PS5/4, Xbox, Switch, Built-in Speaker with Protective Case
- [Portable Monitor Laptop] InnoView laptop screen extender is no need of app and drivers! 15.6 in is a more suitable size for traveling or remote work. Suitable for traveler, student, gamer, engineer, and white-collar worker to connect HP laptop, Lenovo laptop, Dell laptop, Asus laptop, Macbook, iPhone, game console, tablet, PS, Xbox, etc. The laptop screen can expand the viewing area and be more efficient when playing games, working, meeting and studying
- [Plug and Play] The travel monitor for laptop provides 2 full-function Type-C ports and 1 HDMI port to connect most devices. Only one USB-C cable is needed to connect the external display to computer, and it supports power pass-through reverse charging. Note: Your device should support Thunderbolt 3.0/4.0 or USB 3.1 Type-C DP ALT-MODE. If not, you can connect via HDMI and power cable(NOT INCLUDE IN THE PACKAGE)
- [IPS FHD USB C Monitor] 15.6 inch portable screen with a resolution of 1920*1080P, made of A+ IPS screen, supports 178° full viewing angle, can present accurate and vivid colors. Combined with HDR, images and videos present realistic colors and amazing details. Low blue light can effectively reduce blue light radiation damage, no flicker, eye protection, making it easier for you to work and perform multiple tasks at the same time
- [Versatile Cover and Stand] Equipped with a scratch-resistant smart protective cover made of durable PU leather, it can also be used as a stand when working. Two grooves are used to adjust the angle and fix the external monitor. It can also provide all-round protection for the 1080p monitor when going out or traveling, suitable for putting in a backpack to avoid squeezing. Optional landscape and portrait modes, save more desktop space
- [Worry-free Purchase] Since the output power of each device is different, the screen may flicker or restart. You can power the laptop monitor to solve it. Provide a 30-day return policy and 18-month warranty (excluding external force damage). If you have any concerns, please let us know (displayed on the back of the monitor)
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