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Small black rectangular HDMI switch with three ports

OREI BK-21S 2×1 HDMI Switch 8K@60Hz 4K@120Hz 48Gbps Black

SKU CH-N50Y-VW0TJ

Switches two HDMI sources to one display at 8K@60Hz, 4K@120Hz, 48Gbps with auto and manual modes

  • TypeHDMI
  • Changer TypeHDMI
  • ColorBlack
  • Ports3
  • Input Connector3
  • Output ConnectorFemale
  • Switch two sources to one display with 8K@60Hz and 4K@120Hz support
  • Full 48Gbps bandwidth handles HDR10+, Dolby Vision and 1080p@240Hz
  • Auto-switching activates when the active source powers off; manual override always available
  • VRR, ALLM and QFT deliver smoother, low-latency gaming on PS5 and Xbox Series X/S
  • Includes USB power cable and user manual for immediate setup

What It Is

The OREI BK-21S is a 2×1 HDMI switch that routes two HDMI sources to a single display. It supports 8K at 60 Hz, 4K at 120 Hz, and 1080p at 240 Hz with full 48 Gbps bandwidth. The unit handles HDR10+, HDR10, Dolby Vision, and 3D video. Audio formats include LPCM, Dolby TrueHD, Dolby Digital, DTS-HD Master Audio, and DTS 7.1. It is built for gaming consoles, streaming boxes, Blu-ray players, and PCs that need to share one screen.

Installation

Connect each source to the two HDMI inputs and the display to the single HDMI output. The switch draws power from the included USB cable. Auto-switching activates only when the active source is fully powered off; manual selection is always available via the front button. The manufacturer notes that HDMI cables up to 10 ft work reliably. Longer runs may require fiber-optic HDMI cables to maintain the 48 Gbps signal. No drivers or software are needed.

Deciding Spec

The critical specification is the 48 Gbps HDMI 2.1 bandwidth with support for 8K at 60 Hz and 4K at 120 Hz. If your display and sources require this throughput for VRR, ALLM, or QFT gaming features, this switch meets that requirement. Buyers who need more than two inputs, or who require audio extraction, EDID management, or higher refresh rates such as 4K at 165 Hz, should look at other models.

Highlights

  • Switch two sources to one display with 8K@60Hz and 4K@120Hz support
  • Full 48Gbps bandwidth handles HDR10+, Dolby Vision and 1080p@240Hz
  • Auto-switching activates when the active source powers off; manual override always available
  • VRR, ALLM and QFT deliver smoother, low-latency gaming on PS5 and Xbox Series X/S
  • Includes USB power cable and user manual for immediate setup

Specifications

BrandOREI
ModelBK-21
Part NumberBK-21S
TypeHDMI
Changer TypeHDMI
ColorBlack
Ports3
Input Connector3
Output ConnectorFemale
Maximum Resolutions2x1
Dimensions2.0 in x 4.0 in x 0.5 in
Weight0.109 kilograms

Questions about this item

How can I confirm the BK-21S is passing 8K@60Hz or 4K@120Hz to my display after connecting two sources?

Check the display’s on-screen information menu; it should report 8K at 60 Hz or 4K at 120 Hz when the active source sends that signal. The switch supports 48 Gbps bandwidth, VRR, ALLM and QFT, so gaming consoles will show their high-refresh modes without extra setup.

What cables and accessories come with the BK-21S, and what must I provide?

The box includes the BK-21S switch, a USB power cable and a user manual. You must supply three HDMI cables — two for the inputs and one for the output — each rated for 48 Gbps if you want 8K@60Hz or 4K@120Hz performance.

The comparison table lists BK-21, BK-21A, BK-21AC, BK-301, BK-301P, BK-501 and BK-41A; which one should I choose?

Choose the BK-21S when you need a 2×1 switch with auto and manual switching, 48 Gbps bandwidth and support for 8K@60Hz, 4K@120Hz and 1080p@240Hz. Pick BK-301 or BK-301P for three inputs, BK-501 for five inputs, or BK-41A for four inputs if your setup requires more sources.

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