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Black aluminium capture box with HDMI in, HDMI out, USB 3.0 and 3.5 mm audio ports

LUOM

LUOM OZC4-1 4K HDMI USB 3.0 Video Capturing Device

SKU CH-AJ1A-1F784

Captures 4K HDMI at 60 fps and streams 1080p at 60 fps over USB 3.0 with 4K passthrough and 3.5 mm audio I/O

  • InterfaceUSB 3.0
  • Resolution Support4K
  • Camera ResolutionUp to 4K Video
  • ColorBlack
  • HDMI1 Input/1 Output
  • USB Port1
  • 4K@60fps HDMI input captured via USB 3.0
  • 1080p@60fps loop-out for zero-lag gameplay monitoring
  • 4K@30fps HDMI pass-through keeps display at full resolution
  • 5 mm mic in and headphone out for live commentary
  • Works with Windows 10, 11, Mac OS 10.9+, Linux and Android

What the LUOM OZC4-1 captures

The LUOM OZC4-1 is a USB 3.0 video capturing device built for streamers, gamers and conference users who need to record or broadcast an HDMI source. It accepts 4K@60fps input and passes the signal through to a display at up to 4K@30fps while sending captured video to the host computer. A 3.5 mm microphone input and headphone output let you mix live commentary with game audio. The aluminium alloy shell keeps the compact board cool during long sessions.

Limits of the USB 3.0 capture path

The device streams captured video at 1080p@60fps over USB 3.0; 4K capture is not transmitted at full frame rate through the USB link. HDMI loop-out tops out at 4K@30fps, so a 4K@60fps source will be down-scaled on the pass-through display. USB 2.0 ports cannot sustain the required bandwidth, so a USB 3.0 connection is mandatory for the advertised performance. The 3.5 mm ports handle analogue audio only; digital multi-channel formats are not supported.

Installation and common pitfalls

Plug the capture card into a USB 3.0 port, connect the HDMI source to the input and the display to the output, then select the device in OBS, VLC, Amcap or similar software — no driver install is needed on Windows 10/11, Mac OS 10.9+ or Linux. The most frequent issues are using a USB 2.0 port or cable, which caps bandwidth, and forgetting to set the recording software to 1080p@60fps, resulting in dropped frames. Ensure the HDMI cables support 4K@60Hz for the input side.

Highlights

  • 4K@60fps HDMI input captured via USB 3.0
  • 1080p@60fps loop-out for zero-lag gameplay monitoring
  • 4K@30fps HDMI pass-through keeps display at full resolution
  • 5 mm mic in and headphone out for live commentary
  • Works with Windows 10, 11, Mac OS 10.9+, Linux and Android

Specifications

BrandLUOM
SeriesOZC4-1
ModelOZC4-1
InterfaceUSB 3.0
Resolution Support4K
Camera ResolutionUp to 4K Video
ColorBlack
HDMI1 Input/1 Output
USB Port1
Option4K

Questions about this item

Should I pick the 4K@60fps input or the 1080p@60fps streaming mode for my setup?

The device accepts up to 4K@60fps on its HDMI input, then sends up to 4K@30fps through the HDMI loop-out and up to 1080p@60fps over the USB link to your streaming software.

What does the 4K@60fps input rating actually deliver when I hit record in OBS?

Your console or camera can feed 4K at 60 frames per second into the HDMI port, but the USB 3.0 path to the PC carries a maximum of 1080p at 60 frames per second for recording or streaming.

How does the USB 3.0 connection limit what I can stream compared with the HDMI pass-through?

The HDMI pass-through outputs up to 4K@30fps to a monitor with near-zero latency, while the USB 3.0 link to the computer caps the captured stream at 1080p@60fps.

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