What Is the UHD12-EX230-K?
The OREI UHD12-EX230-K is a 1x2 4K HDMI Extender Splitter that sends one HDMI source to two remote displays over CAT6/7 cable, at distances up to 230ft/70m. It takes a single HDMI input at the Transmitter and distributes the same signal to two Receivers, each connected by a single CAT6/7 cable, so you can place displays far from the source without running long HDMI cables.
It is useful for setups where one source, such as a Blu-ray player, set-top box, or media player, needs to feed two displays in different rooms or locations. Instead of running two long HDMI cables, you run standard CAT6/7 cabling to each Receiver.
The UHD12-EX230-K is HDCP 2.2 compliant with 18Gbps video bandwidth. It extends media up to 230ft/70m at 4K@30Hz and up to 197ft/60m at 4K@60Hz over a single CAT6 cable. It supports HDR formats including HDR10, HDR10+, Dolby Vision, and HLG. An HDMI loop output at the Transmitter lets you connect a local display near the source, and advanced EDID management improves compatibility across connected displays. Power over Cable technology means only one power adapter is needed, connected at the Transmitter.
IMPORTANT — UHD12-EX230-K Duplicates One Source to Two Displays
The UHD12-EX230-K is a splitter, so both Receivers show the same content from the single HDMI source at the same time.
It is designed for customers who want to:
- Send one source to two displays in separate rooms or locations
- Add a local display at the source using the HDMI loop output, plus two remote displays through the Receivers
It does not send a different signal to each Receiver. Both Receivers, and the Transmitter loop output, carry the same source content.
IMPORTANT — This Device Duplicates a Display, It Does Not Extend the Desktop
When used with a PC, the UHD12-EX230-K duplicates your PC screen to multiple locations.
It does not extend the desktop across displays. If you connect a PC, each display mirrors the same screen rather than acting as additional desktop space.
IMPORTANT — eARC Audio Depends on the Output Path
The Transmitter HDMI loop output and the remote Receivers support different audio formats.
- HDMI Loop Out (local display at the Transmitter): LPCM, Dolby Digital/Plus/EX, Dolby True HD, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DSD
- Remote End (Receivers): LPCM 2.0, Dolby 5.1, DD+7.1, DTS 5.1
The local loop output passes the full range of high-bitrate audio formats. The remote Receivers carry a more limited set of audio formats. Choose your audio routing based on which output you are using.
IMPORTANT — Use Straight Through CAT Cables, Do Not Cross Connect
The UHD12-EX230-K requires straight through CAT cables wired to the TIA-568B standard.
Connect each Receiver to the Transmitter using the direct interconnection method. Do not cross connect the cabling. For best results, use CAT6 or CAT7 cable between the Transmitter and each Receiver.
Ports and Panel Layout
The UHD12-EX230-K kit includes one Transmitter and two Receivers. Each unit has its own ports and indicators.
Transmitter:
| Port / LED / Switch | Location | Function |
| Power Switch | Transmitter | Press to power the Transmitter on or off |
| Power LED | Transmitter | Red LED lights up when the Transmitter is powered on |
| EDID DIP Switch | Transmitter | Set EDID using the DIP switch. 1 is Up and 0 is Down. See the EDID Setting List below |
| SERVICE | Transmitter | USB-C firmware update port |
| HDMI IN | Transmitter | Connect a media device such as a DVD player, Blu-ray player, or set-top box |
| HDMI LOOP OUT | Transmitter | Connect a local display such as a TV or monitor near the source |
| CAT OUT 1 / CAT OUT 2 | Transmitter | Connect a CAT6/7 cable to each port. The other end connects to a Receiver |
| DC 12V | Transmitter | Connect the included power adapter |
Receiver (each of the two Receivers):
| Port / LED | Location | Function |
| HDMI OUT | Receiver | Connect a display device such as a TV or monitor |
| Power LED | Receiver | Red LED lights up when the Receiver is powered on |
| CAT IN | Receiver | Connect a CAT6/7 cable. The other end connects to the Transmitter |
Step-by-Step Setup
- Connect your HDMI source device, such as a Blu-ray player, DVD player, or set-top box, to the HDMI IN port on the Transmitter.
- If you want a local display near the source, connect it to the HDMI LOOP OUT port on the Transmitter.
- Connect a CAT6/7 cable to CAT OUT 1 on the Transmitter, then run the other end to the CAT IN port on the first Receiver.
- Connect a second CAT6/7 cable to CAT OUT 2 on the Transmitter, then run the other end to the CAT IN port on the second Receiver.
- Connect a display device, such as a TV or monitor, to the HDMI OUT port on each Receiver.
- Connect the included power adapter to the DC 12V port on the Transmitter. The Receivers are powered over the CAT cable, so no separate power adapter is needed at the Receiver end.
- Set the Power Switch on the Transmitter to ON. Confirm the red Power LED is lit on the Transmitter and on each Receiver.
- Turn on the source device and all connected displays.
- Confirm the same source content is displaying on both Receiver displays and on the local loop output display if connected.
Note: Use the EDID DIP switch on the Transmitter to match the capabilities of your displays and audio system. Refer to the EDID Setting List below.
Cable Requirement — Important
Use straight through CAT6 or CAT7 cable wired to the TIA-568B standard between the Transmitter and each Receiver. Connect using the direct interconnection method and do not cross connect.
For reference, the maximum transmission distance is 230ft/70m at 4K@30Hz and 197ft/60m at 4K@60Hz over a single CAT6 cable.
Understanding EDID Settings
The UHD12-EX230-K includes advanced EDID management, set using the DIP switch on the Transmitter, where 1 is Up and 0 is Down.
EDID tells the source device which video resolutions and audio formats the connected displays support. Choosing the right EDID setting helps you get the correct resolution and audio output for your equipment.
EDID Setting List (1 = UP, 0 = DOWN):
- DIP 1111 → 4K60 (444), 2.0CH
- DIP 1110 → 4K60 (444), 5.1CH
- DIP 1101 → 4K60 (444), 7.1CH
- DIP 1100 → 4K60 (444) HDR, 2.0CH
- DIP 1011 → 4K60 (444) HDR, 5.1CH
- DIP 1010 → 4K60 (444) HDR, 7.1CH
- DIP 1001 → 4K30, 2.0CH
- DIP 1000 → 4K30, 5.1CH
- DIP 0111 → 4K30, 7.1CH
- DIP 0110 → 1080P, 2.0CH
- DIP 0101 → 1080P, 5.1CH
- DIP 0100 → 1080P, 7.1CH
- DIP 0011 → 1920x1200, 2.0CH
- DIP 0010 → 1280x800, 2.0CH
- DIP 0001 → 1024x768, 2.0CH
- DIP 0000 → Copy Transmitter loop out EDID
What Source Devices Is the UHD12-EX230-K Compatible With?
The UHD12-EX230-K is compatible with HDMI source devices that output a standard HDMI signal.
It can be used with:
- Blu-ray players
- DVD players
- Set-top boxes
- Streaming media devices
- PCs and laptops with HDMI output
For 4K playback, the source should output a supported 4K resolution. The device supports resolutions up to 3840x2160 (4K) and 4096x2160 (4K) at 24/25/30/50/60Hz, along with common 1080p and PC resolutions.
What Displays Is the UHD12-EX230-K Compatible With?
The UHD12-EX230-K is compatible with HDMI displays such as TVs, monitors, and projectors that accept a standard HDMI input.
It can be used with:
- 4K TVs and monitors
- 1080p TVs and monitors
- Projectors with HDMI input
Because the device duplicates one source to all connected displays, both Receiver displays and the local loop output display show the same content. For best results, set the EDID DIP switch to match the lowest common capability of your connected displays.
Frequently Asked Questions
Q: What is the OREI UHD12-EX230-K used for?
A: The UHD12-EX230-K is used to send one HDMI source to two displays in remote locations over CAT6/7 cable, at distances up to 230ft/70m. It also provides an HDMI loop output for a local display near the source.
Q: How far can the UHD12-EX230-K extend my source?
A: It extends media up to 230ft/70m at 4K@30Hz and up to 197ft/60m at 4K@60Hz over a single CAT6 cable.
Q: Does each Receiver show different content?
A: No. The UHD12-EX230-K is a splitter, so both Receivers and the Transmitter loop output show the same source content at the same time.
Q: Do I need a power adapter at each Receiver?
A: No. The UHD12-EX230-K uses Power over Cable technology, so only one power adapter is needed, connected to the Transmitter. The Receivers are powered over the CAT cable.
Q: Can I use this to extend my PC display to multiple locations?
A: You can use this device to duplicate your PC screen to multiple locations. However, it will not extend the desktop. Each display mirrors the same screen rather than adding extra desktop space.
Q: What cable should I use between the Transmitter and Receivers?
A: Use straight through CAT6 or CAT7 cable wired to the TIA-568B standard. Connect using the direct interconnection method and do not cross connect.
Q: I am not getting any video output. What should I check?
A: Try a lower resolution from the source device, try changing the CAT cable, and try changing the EDID settings. Also check whether the HDMI LOOP OUT on the Transmitter is showing the same issue, which helps identify whether the problem is at the source or in the extension path.
Q: Is the UHD12-EX230-K HDCP compliant?
A: Yes. The UHD12-EX230-K is HDCP 2.2 compliant and supports 18Gbps video bandwidth.
Q: Does it support HDR?
A: Yes. The UHD12-EX230-K supports HDR10, HDR10+, Dolby Vision, and HLG.
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