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onn. 4-Port 4K HDMI Splitter: Enough for Your Monitor and Projector Setup?

The onn. 4-Port High Speed 4K HDMI Splitter routes one HDMI source to four screens for just USD 7.99. See who it suits, what it does well, and the trade-offs before you buy.

Last updated Aug 17, 2026

When you need to send one HDMI source to multiple screens at once, the question isn't just whether to buy a splitter-it's whether a compact 4-port model like the onn. 4-Port High Speed 4K HDMI Splitter can handle your setup without clutter or confusion. If you're juggling a monitor, projector, or TV and want to show the same content in more than one place, this little box promises a straightforward answer for a very low listed price.

Quick verdict

The onn. 4-Port High Speed 4K HDMI Splitter is a simple, no-frills way to duplicate one HDMI signal to up to four displays. At USD 7.99, it's an inexpensive option if you need to mirror a single source-like a laptop, streaming stick, or cable box-to multiple screens. It's not about switching between sources; it's about sending the same picture and sound everywhere at once.

Who it suits

This splitter makes sense if you have a projector in a conference room, a monitor on your desk, and a TV on the wall-and you want all of them to show the same thing without swapping cables. It also works well for digital signage, classroom presentations, or any scenario where one source needs to feed several displays. Because the listed compatibility is universal, it's meant to work with any HDMI-equipped device.

What stands out from the listed details

The headline feature is the 1:4 split, meaning one input goes to four outputs. That's a practical way to extend a single video source across multiple screens. The title also says it supports 4K video, so it's positioned for high-resolution displays, and it carries both audio and video through HDMI-so you don't need a separate audio cable in most cases.

Its compact design is another plus. A small splitter like this can sit behind a monitor or near a projector without taking over your desk or media console. Plus, the listed price of USD 7.99 is hard to argue with if you're on a tight budget and just need a simple distribution tool.

Meaningful trade-offs

Before you click buy, understand what this splitter is not. It's a splitter, not a switch. That means it duplicates one signal to multiple screens; it doesn't let you choose between different sources feeding one display. If your real need is to connect several devices to a single monitor, this isn't the tool.

Also, this unit is listed as used. That's worth weighing if you prefer brand-new electronics or need a product with a sealed warranty-though the listing doesn't specify any warranty terms, so it's safest to account for that uncertainty.

The 4K support is mentioned in the title, but there's no detail on the exact HDMI version or maximum refresh rate. If your setup depends on very high frame rates or specific HDMI features, you may want to check those specs elsewhere. The splitter is designed for universal compatibility, but the provided information doesn't confirm every possible HDMI edge case.

Product note

onn. 4-Port High Speed 4K HDMI Splitter For HDTVs Monitors and Projectors

onn. 4-Port High Speed 4K HDMI Splitter For HDTVs Monitors and Projectors

This is the product you're looking at: a 4-port HDMI splitter that takes one source and sends it to four displays. The listed price is USD 7.99, and the description highlights its ability to connect up to four HDMI-compatible devices. The 1:4 duplication feature means you can mirror a single signal to multiple screens, and the audio/video output via HDMI keeps the connection simple. It's a compact, budget-oriented accessory for a monitor, projector, or HDTV setup.

Bottom line

If your goal is to get one HDMI signal to four screens at the lowest possible entry price, the onn. 4-Port High Speed 4K HDMI Splitter is a reasonable pick. It's simple, compact, and designed for universal use. Just go in knowing that it's a used unit, it's a splitter rather than a switch, and the 4K details are kept general. For the listed price, it's a low-risk way to solve a real multi-screen problem-as long as your expectations match what a basic splitter can do.

Products in this article
onn. 4-Port High Speed 4K HDMI SplitterUSD 7.99View on eBay
onn. 4-Port High Speed 4K HDMI SplitterUSD 7.99View on eBay

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