10 Best Second Monitor 2025 in the United States

The MNN Portable Monitor is a handy 15.6-inch Full HD display perfect for those needing a second screen. With a resolution of 1920x1080, it offers clear and detailed images, which is great for both work and entertainment. The IPS matte screen ensures vibrant colors and wide viewing angles, making it easier on the eyes for extended use. The anti-blue light feature is a nice touch for reducing eye strain during long hours of use.

One of its standout features is its portability. It's lightweight and ultra-slim, making it easy to carry around, whether you're traveling or just moving from room to room. The monitor comes with a smart cover that doubles as a stand, providing protection and convenience. Connectivity is a strong point with this monitor, offering two full-featured USB-C ports that support power and display signal transmission. This means you can easily connect it to a variety of devices, including laptops, PCs, phones, and gaming consoles.

The monitor also includes built-in speakers, which is a nice addition, although they might not provide the best sound quality for those looking for an immersive audio experience. Adjustability options like different display modes (Copy, Extended, Second Screen, Portrait) and HDR support enhance its versatility, making it suitable for both work and gaming. While the monitor offers significant benefits, there are a few limitations. It relies heavily on having compatible USB-C ports, and the sound quality from the built-in speakers may not meet the expectations of all users. Additionally, the reliance on the original USB-C cable means that losing it could be a hassle. Despite these minor drawbacks, the MNN Portable Monitor is an excellent choice for those needing a versatile and portable second screen solution.

The KYY 15.6-inch Portable Monitor is a solid option for those seeking a second monitor, offering Full HD 1080p resolution for crisp and clear visuals. The IPS panel ensures vibrant colors and wide viewing angles, making it suitable for various uses, including gaming, multimedia, and professional tasks. Its compact and lightweight design (1.7 pounds and 0.3 inches thick) makes it highly portable, ideal for users who need a second screen on-the-go.

Connectivity is versatile with two USB Type-C ports and a Mini-HDMI port, allowing easy connection to laptops, smartphones, gaming consoles, and more. However, it’s important to note that compatibility requires devices to support Thunderbolt 3 or USB-C 3.1. The monitor also includes built-in speakers and a durable smart cover that doubles as a stand, although the audio quality may not be as immersive as external speakers. The matte screen surface reduces glare, providing a comfortable viewing experience even in bright environments.

One downside is the lack of adjustable stand height or rotation, offering limited ergonomic flexibility. Despite minor drawbacks, the KYY Portable Monitor is a practical and high-performing choice for users needing a versatile and portable second screen.

The Dell S2425HS Monitor offers a 23.8-inch display with a Full HD resolution (1920x1080p), which provides clear and detailed visuals. The 100Hz refresh rate ensures smoother motion, making it suitable for both work and casual gaming. Its In-Plane Switching (IPS) technology offers consistent and vibrant colors across wide viewing angles, with 99% sRGB color coverage enhancing the visual experience.

The modern, ultrathin bezels create a sleek look and minimize distractions, while the matte screen surface reduces glare, making it easier on the eyes during extended use. The monitor also boasts TÜV Rheinland 4-star eye comfort certification and ComfortView Plus to reduce blue light emissions, which helps reduce eye fatigue over long periods of use. This makes it a good option for users who spend a lot of time in front of the screen. Connectivity is robust with dual HDMI ports allowing seamless switching between devices, and the improved cable management system helps maintain a clutter-free workspace.

The integrated dual 5W speakers provide decent audio quality for a monitor, although it may not replace dedicated speakers for audiophiles. The monitor is highly adjustable with options to tilt, swivel, pivot, and adjust the height, allowing for a customizable and ergonomic setup. However, at 23.8 inches, the screen size might be on the smaller side for those looking for a more immersive viewing experience. Additionally, while the 100Hz refresh rate is an improvement over the standard 60Hz, it may not meet the needs of more serious gamers who require even higher refresh rates. The Dell S2425HS Monitor is a strong choice for a second monitor, particularly for those who value eye comfort, color accuracy, and adjustability.