LG 24U421A-B.AUSQ Review: A Curved 100Hz Monitor with USB-C Power Delivery
The LG 24U421A-B.AUSQ is a feature-packed curved monitor designed for focused productivity and smooth casual use, offering a 100Hz refresh rate and one-cable USB-C connectivity.
By Elvis Dicki
Updated October 22, 2026
The LG 24U421A-B.AUSQ is a 23.8-inch curved Full HD monitor built to enhance focus and simplify desk setups. Targeting office workers, students, and casual gamers, it combines a 100Hz refresh rate, USB-C connectivity with power delivery, and LG’s custom Switch app for productivity into a sleek, nearly bezel-less package. For users seeking a curved display that smooths out everyday tasks and reduces cable clutter without breaking the bank, this LG model presents a compelling option.
It stands out in the crowded monitor market by offering a specific blend of ergonomic design, motion clarity for non-competitive gaming, and modern connectivity. Its 1500R curved VA panel aims to keep more of the screen in your peripheral view, while features like Reader Mode for reduced blue light and a slim stand help maintain comfort during long sessions. This review analyzes its specifications, design, and performance based on the manufacturer’s data and user feedback to determine if the LG 24U421A-B.AUSQ delivers on its promises for the modern multi-tasker.
Prime LG 24U421A-B 24-Inch Curved Full HD Monitor 100Hz
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LG 24U421A-B.AUSQ at a Glance
| Specification | Detail |
|---|---|
| Screen Size & Type | 23.8-inch Curved VA Panel |
| Resolution | 1920 x 1080 (Full HD) |
| Curvature | 1500R |
| Refresh Rate | 100 Hz |
| Response Time | 5ms (GtG) |
| Key Connectivity | 1x HDMI, 1x USB Type-C (15W PD) |
| HDR Support | HDR10 |
| Stand Adjustments | Tilt only |
| Bezel Design | 3-side borderless |
| Warranty | 1 Year Manufacturer |
Design and Build
The LG 24U421A-B.AUSQ employs a minimalist aesthetic centered on reducing visual distraction and saving desk space. Its most prominent design feature is the 1500R curved screen, which LG states is engineered to keep more of the display within a user’s field of view, potentially reducing eye strain during extended work periods. The curve is subtle yet noticeable, intended to create a more immersive viewing experience whether you’re working on documents or watching videos.
Complementing the curved panel is a three-side virtually borderless design. The thin bezels on the top and sides minimize distractions, creating a cleaner look that is particularly advantageous for multi-monitor setups, as the seams between displays are less intrusive. The stand is a notable part of the design philosophy; it is an ultra-slim tilt-only stand meant to maximize usable desk space. While it contributes to a clutter-free aesthetic, it offers only tilt adjustment for ergonomics. Height, swivel, and pivot adjustments are not listed as features. The monitor is wall-mount compatible via a VESA interface (specific size not provided in the data), offering an alternative for those seeking more flexibility. The overall build, with dimensions of 6.69″D x 21.11″W x 16.22″H and a weight of 6.4 pounds, suggests a sturdy yet manageable footprint.
Performance and Features
Display Quality and Motion Handling
At the core of the LG 24U421A-B.AUSQ is a 23.8-inch VA panel with a Full HD (1920×1080) resolution. The 1080p resolution at this screen size results in a pixel density that delivers clear text and detailed images suitable for general use. The monitor supports HDR10, which can enhance color and contrast in compatible content, though peak brightness is listed at 250 nits. The VA technology typically offers high contrast ratios, and this model lists a 3000:1 contrast ratio, which should provide deep blacks and a vivid picture. The color gamut is specified as 99.0 (sRGB coverage is not explicitly stated by the manufacturer).
For motion performance, the 100Hz refresh rate is a step above the standard 60Hz, promising smoother scrolling, video playback, and casual gaming. Paired with a 5ms Gray-to-Gray response time, it aims to reduce motion blur. LG includes specific gaming-oriented features like Dynamic Action Sync, which is designed to minimize input lag for more responsive control, and Black Stabilizer, which brightens dark scenes to help spot details in shadows. These features indicate LG’s intent to cater to casual gamers who value smoother visuals but are not necessarily engaged in high-frame-rate competitive gaming.
Connectivity and Ports
Connectivity is a strong suit for this monitor. It provides an HDMI port for traditional connections to PCs, gaming consoles, or media players. The standout feature is the inclusion of a USB Type-C port with up to 15W of power delivery. This allows users with compatible laptops to connect video, data, and power through a single cable, significantly reducing desktop clutter. The monitor also includes a headphone jack, as mentioned in the description, offering a convenient audio-out option. The total number of USB data ports for peripherals is listed as one USB 3.0 port. The specific version of HDMI is not detailed in the provided data.
Key Features and Software
LG equips the 24U421A-B.AUSQ with several features aimed at user comfort and productivity. Reader Mode reduces blue light emission to help alleviate eye strain during long periods of reading or document work. The headline software feature is the LG Switch app. This application, which requires a separate download, transforms the monitor into a multitasking hub. It allows users to split the screen into up to six different sections, customize layouts, and assign hotkeys for quick access to features or applications. The app also facilitates switching between a connected PC and the monitor’s built-in webOS smart platform, streamlining workflow for those who use streaming services.
Setup, Support and Ownership
Setup appears straightforward. The monitor comes with a stand base, stand body, screws, a power adapter and cord, an HDMI cable, and a quick setup guide. The tilt-only stand likely requires minimal assembly. For users opting for a VESA wall mount, that would be an additional purchase, as the specific mount or bracket is not included. The USB-C functionality provides a plug-and-play experience for laptop users seeking a single-cable solution.
Ownership support includes a standard 1-year manufacturer’s warranty. The description notes that the LG Switch app requires software installation, directing users to LG’s support website for download. Firmware update procedures or long-term driver support are not detailed in the provided specifications. The monitor’s power consumption is rated at 14.4 watts, suggesting reasonable energy efficiency for daily use. For more insights on optimizing a modern workstation, including monitor placement and ergonomics, you can explore our guides on the best desk chairs for gaming and setups.
What Owners Say
Overall user feedback for the LG 24U421A-B.AUSQ is positive. The aggregated rating distribution shows that the majority of reviewers award it four or five stars, with a smaller percentage giving lower scores. While specific review excerpts are not provided in the data, the high percentage of favorable ratings suggests users appreciate its combination of the curved screen, smooth 100Hz performance, and the convenience of USB-C connectivity. The critical feedback from the minority of lower ratings could relate to areas like the stand’s limited adjustability or preferences for higher resolution, but these are inferences from the rating distribution rather than stated complaints.
Pros and Cons
Pros
- Immersive 1500R curved VA panel with vivid Full HD visuals
- Smooth 100Hz refresh rate and 5ms response for everyday tasks and casual gaming
- Versatile USB Type-C connectivity with 15W power delivery reduces cable clutter
- Useful features like Reader Mode and Black Stabilizer enhance comfort and gameplay
- Customizable multitasking via the LG Switch app (after software download)
- Slim, space-saving stand and three-side borderless design for a clean setup
Cons
- Stand offers only tilt adjustment, lacking height, swivel, or pivot
- 100Hz refresh rate is suitable for casual use but not for high-refresh-rate competitive gaming
- The full functionality of the Switch app requires a separate software download
- Full HD resolution may not satisfy users seeking higher pixel density for professional creative work
- HDR performance is limited by the 250-nit peak brightness specification
- Specific details on panel uniformity or color accuracy out-of-the-box are not provided
Who Should Buy It (and Who Should Skip It)
The LG 24U421A-B.AUSQ is an excellent fit for home office users, students, and general multitaskers who spend long hours in front of a screen and would benefit from a curved display for reduced eye strain. Its USB-C with power delivery makes it a perfect companion for modern laptops, enabling a clean, one-cable docking solution. Casual gamers and media consumers will appreciate the smoother motion from the 100Hz panel and features like HDR10 and Black Stabilizer. If your priority is a clutter-free desk with a visually immersive screen for productivity and entertainment, this monitor is a strong candidate.
This monitor is not the ideal choice for competitive esports gamers who require refresh rates of 144Hz or higher and faster response times. Professionals in color-critical fields like photo editing may find the Full HD resolution and unspecified color accuracy insufficient. Users who need extensive ergonomic adjustments should look for models with height and swivel stands or plan to purchase a separate VESA arm. Similarly, those seeking the ultrawide aspect ratio for enhanced productivity or immersive gaming should consider dedicated ultra-wide monitors.
Final Verdict
The LG 24U421A-B.AUSQ successfully delivers a focused package for the modern user who values a clean desk and comfortable viewing. Its 1500R curve, smooth 100Hz performance, and thoughtful features like Reader Mode and the Switch app create a user-friendly experience tailored for productivity and casual enjoyment. The inclusion of USB-C with power delivery is a significant modern convenience that sets it apart from many monitors in its class, addressing the needs of laptop users perfectly.
While the tilt-only stand and 100Hz cap mean it won’t satisfy ergonomic purists or competitive gamers, these are understandable trade-offs at this feature set and likely price point. For its target audience—those seeking a curved, focused display that simplifies their setup and smooths out their daily digital routine—the LG 24U421A-B.AUSQ is a well-rounded and compelling offering. It embodies the trend towards integrated, minimalist workspaces without sacrificing performance where it counts most for everyday use. For related technology insights and reviews, check out our broader coverage in the Tech Gear section.
FAQs
Does the LG 24U421A-B.AUSQ have built-in speakers?
The product specifications and description provided do not list built-in speakers as a feature. The monitor includes a headphone jack for audio output, suggesting users will need external speakers or headphones for sound.
What is the VESA mount pattern for this monitor?
The manufacturer’s data confirms the monitor is wall-mount compatible but does not specify the exact VESA mount pattern (e.g., 75x75mm or 100x100mm). Users should verify the specific VESA size from LG’s official specifications or product manual before purchasing a mount.
Can the USB-C port charge a laptop?
Yes, the USB Type-C port supports Power Delivery (PD) up to 15 watts. This can charge compatible laptops and devices, though 15W may be sufficient for maintaining charge during use or slow charging rather than fast charging for high-power laptops.
Is the LG Switch app required to use the monitor?
No, the core functions of the monitor work without the LG Switch app. The app is optional software that unlocks advanced multitasking features, screen splitting layouts, and quick-access hotkeys. Basic monitor operation is available through the on-screen display menu.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.