CLOSS HDMI Splitter 1 in 2 Out, 4K HDMI Splitter for Dual Monitors, Supports 3D Full HD 1080P Aluminum, Compatible for PS4 Fire Stick HDTV Review (2026)

Who this splitter fits

This splitter is built for someone who wants a single HDMI source, a cable box, game console or streaming stick, mirrored onto two displays at the same time rather than needing to unplug and replug a cable every time they switch screens. A common use case is sending the same feed to both a main TV and a projector for a second viewing area, or duplicating a signal to two monitors for a dual display setup that shows identical content rather than an extended desktop. Because it is a passive style duplicator rather than a matrix switcher, it is meant for mirroring one source to two outputs, not switching between multiple sources. The site ranks it first among seven HDMI splitters it compares.

What the aluminum build and format support cover

The aluminum housing is a practical choice for a small always on device like this, since metal sheds heat better than plastic and gives the unit a sturdier feel on a shelf behind the TV. It is built as a plug and play device, meaning there are no drivers or companion apps to install, just HDMI cables in and out. The listing specifies support for 3D content and Full HD 1080P output on both displays, covering the resolution most home theater and monitor setups actually run day to day. As with most splitters in this price and format class, treat any 4K support as best used at lower refresh rates rather than assuming full 4K at 60Hz across both outputs.

Setting it up and living with it

Setup is straightforward: connect the source device to the single HDMI input, then run separate HDMI cables from each output port to the two displays, and the same picture and sound should appear on both simultaneously. Because it mirrors rather than extends, both screens always show identical content, which is useful for a projector and TV combo but not for anyone wanting different content on each screen. As with any compact HDMI splitter, keeping cable runs reasonably short helps avoid signal dropouts, and it is worth testing the exact source and display combination before relying on it for something like a movie night, since compatibility between splitters and copy protected apps can vary by device.

Where budget splitters like this run into limits

The site's own cons note that HDR passthrough is not mentioned for this listing and that splitters in general can struggle with HDCP copy protection on some streaming apps, and that lines up with how this class of aluminum HDMI splitter is typically built. Devices marketed this way commonly do not carry full HDCP 2.2 support, which is what protected 4K streams from services like Netflix or Disney+ require to play without a black screen or error message. Splitters that do advertise full 4K at 60Hz with HDCP 2.2 support usually say so explicitly and often include a powered adapter, which is a useful thing to check for if reliable 4K streaming through both outputs matters more than basic 1080P mirroring.

Verdict and who should pick something else

For mirroring a 1080P source like a Fire Stick, cable box or older game console onto two screens, such as a TV and a projector, this CLOSS splitter is an affordable, simple option with a solid aluminum build. Anyone who needs reliable playback of protected 4K streaming content, such as 4K Netflix or Disney+, on both outputs should look for a splitter that explicitly lists full HDCP 2.2 support and true 4K at 60Hz rather than assuming this budget class of splitter covers that case. Gamers wanting to mirror a 4K60 console feed to two displays at once should also check a source device's exact output settings against the splitter before buying.

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