UHD-104 Overview and Use Cases

What Is the UHD-104?

The OREI UHD-104 is a 4K@60Hz 1x4 HDMI splitter. It takes one HDMI source and duplicates the same audio/video signal to up to four HDMI displays at the same time.

The HDMI source connects to HDMI IN, and up to four TVs, monitors, projectors, or displays connect to HDMI OUT 1 through HDMI OUT 4.

The UHD-104 supports HDMI 2.0, HDCP 2.2, 18Gbps video bandwidth, video resolutions up to 4K@60Hz, 3D support, EDID management, and HDMI audio pass-through including LPCM 7.1CH, Dolby TrueHD, and DTS-HD Master Audio. The manual’s application diagram shows one DVD or Blu-ray player connected to HDMI IN and multiple displays connected to HDMI OUT 1–4.

The UHD-104 is useful for home theaters, conference rooms, classrooms, offices, retail displays, restaurants, bars, digital signage, worship facilities, and commercial AV setups where one HDMI source needs to be shown on up to four displays.

IMPORTANT — UHD-104 Is a 1x4 HDMI Splitter

The UHD-104 duplicates one HDMI source to four HDMI outputs.

This product mirrors one HDMI source. It does not create independent video outputs and does not extend a PC desktop across four screens.

IMPORTANT — Supports 4K@60Hz

The UHD-104 supports video resolutions up to 4K@60Hz.

To get 4K@60Hz, the HDMI source, HDMI cables, connected displays, and EDID setting must all support the required signal.

IMPORTANT — HDMI 2.0 / HDCP 2.2

The UHD-104 supports HDMI 2.0 and HDCP 2.2.

Protected HDMI content requires compatible HDCP support across the source, splitter, HDMI cables, and connected displays.

IMPORTANT — EDID STD / TV Modes Are Included

The UHD-104 includes STD and TV EDID modes.

Use EDID settings when there is no video, wrong resolution, audio compatibility issue, or mixed display problem.

IMPORTANT — Downscaling Works in TV EDID Mode

The UHD-104 supports downscaling behavior in TV EDID mode.

This is useful when using a 4K source with both 4K and 1080p displays.

For best results, connect the main 4K display to HDMI OUT 1 when using TV mode.

IMPORTANT — All Displays Show the Same Content

The UHD-104 sends the same HDMI source to all connected displays.

If a laptop or PC is connected, the splitter mirrors the same screen. It does not create four separate extended monitors.

IMPORTANT — This Is Not an Audio Extractor

The UHD-104 passes HDMI audio through the HDMI outputs, but it does not provide separate audio extraction ports.

Use a dedicated HDMI audio extractor or a splitter with audio extraction if separate audio output is needed.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the HDMI source device to HDMI IN on the UHD-104. 
   Examples include a DVD player, Blu-ray player, cable box, satellite receiver, streaming device, laptop, desktop PC, DVR, NVR, or game console.
2. Connect HDMI OUT 1 to the first display.
3. Connect HDMI OUT 2, HDMI OUT 3, and HDMI OUT 4 to additional displays as needed.
4. Connect the included DC 5V/1A power adapter.
5. Set the EDID switch to STD or TV.
6. Power on the HDMI source, displays, and splitter.
7. Check that the POWER LED is on.
8. Check the IN LED to confirm the source is detected.
9. Check OUT 1–4 LEDs to confirm connected displays are detected.
10. Test video and HDMI audio on all connected displays.

HDMI Cable Requirement — Critical

Use high-quality HDMI cables rated for the resolution being used.

Poor HDMI cables may cause:

1. No video
2. Flickering
3. Black screen
4. One output not working
5. 4K@60Hz not working
6. HDCP handshake issues
7. Audio dropouts 
    
   For troubleshooting, test each HDMI cable directly between the source and display.

Power Requirement — Critical

The UHD-104 uses a DC 5V/1A power adapter.

If the POWER LED does not turn on, check the power adapter, outlet, and DC 5V connection.

Understanding STD EDID Mode

STD mode uses the splitter’s built-in EDID.

Use STD mode when:

1. You are using 1080p displays
2. Some displays do not show video in TV mode
3. You want a stable 1080p stereo output
4. Mixed displays are causing handshake problems
5. Audio compatibility issues occur 
    
   In STD mode, the video output is set to 1080p@60Hz and the audio output is LPCM 2CH stereo.

Understanding TV EDID Mode

TV mode copies EDID from HDMI OUT 1.

Use TV mode when:

1. HDMI OUT 1 is the main display
2. The source should follow the capability of the display connected to OUT 1
3. You want downscaling support for mixed 4K and 1080p displays
4. All connected displays can work with the selected source format 
    
   If HDMI OUT 1 is connected to a 4K TV, 4K displays receive 4K and 1080p displays automatically receive a downscaled 1080p signal.

Understanding the Application Example

The application diagram shows one HDMI source connected to HDMI IN and four HDMI outputs connected to displays.

The diagram shows the splitter connected to:

1. HDTV
2. HDTV
3. Projector
4. Displayer
5. DVD or Blu-ray player
6. Power supply 
    
   This confirms the primary use case: one HDMI source shown on up to four HDMI displays at the same time.

Supported Video and Audio

The UHD-104 supports video formats including:

Supported HDMI audio formats include:

Supported Technical Specifications

What Source Devices Is the UHD-104 Compatible With?

The UHD-104 is compatible with HDMI source devices such as:

1. DVD players
2. Blu-ray players
3. Cable boxes
4. Satellite receivers
5. Streaming devices
6. Media players
7. Desktop PCs
8. Laptops with HDMI output
9. DVRs
10. NVRs
11. Game consoles
12. HDMI switch outputs
13. HDMI matrix outputs 
     
    The source must output a supported HDMI resolution up to 4K@60Hz.

What Displays Is the UHD-104 Compatible With?

The UHD-104 can connect to HDMI displays such as:

1. 4K TVs
2. 1080p TVs
3. Monitors
4. Projectors
5. Commercial displays
6. Digital signage displays
7. Classroom displays
8. Conference room displays
9. Restaurant TVs
10. Bar displays
11. Retail displays
12. Worship facility displays 
     
    For 4K@60Hz, the display must support the selected 4K signal format.

Frequently Asked Questions

Q: What is the OREI UHD-104 used for? 
A: It is used to split one HDMI source to up to four HDMI displays.

Q: Is the UHD-104 a splitter or extender? 
A: It is an HDMI splitter. It does not extend HDMI over CAT cable by itself.

Q: How many HDMI inputs does it have? 
A: It has one HDMI input.

Q: How many HDMI outputs does it have? 
A: It has four HDMI outputs.

Q: Does it show the same content on all displays? 
A: Yes. All connected displays show the same HDMI source.

Q: Can it show different content on each display? 
A: No. It duplicates one HDMI input to all outputs.

Q: Can it extend my computer desktop across four screens? 
A: No. It mirrors the same PC screen to multiple displays.

Q: Does the UHD-104 support 4K@60Hz? 
A: Yes. It supports up to 4K@60Hz.

Q: Does it support 8K? 
A: No. It supports up to 4K@60Hz.

Q: Does it support 4K@120Hz? 
A: No. It does not support 4K@120Hz.

Q: What HDMI version does it support? 
A: It supports HDMI 2.0.

Q: What HDCP version does it support? 
A: It supports HDCP 2.2.

Q: What video bandwidth does it support? 
A: It supports 600MHz / 18Gbps video bandwidth.

Q: Does it support EDID management? 
A: Yes. It supports STD and TV EDID modes.

Q: What is STD EDID mode? 
A: STD mode uses built-in EDID and sets output to 1080p@60Hz with LPCM 2CH stereo audio.

Q: What is TV EDID mode? 
A: TV mode copies HDMI OUT 1 EDID and supports downscaling behavior.

Q: Which output is used for EDID copy? 
A: HDMI OUT 1 is used in TV mode.

Q: Does the UHD-104 support downscaling? 
A: Yes. In TV mode, if HDMI OUT 1 is connected to a 4K TV, 4K displays receive 4K and 1080p displays receive a downscaled 1080p signal.

Q: Can I use mixed 4K and 1080p displays? 
A: Yes. Use TV EDID mode with the main 4K display connected to HDMI OUT 1 for downscaling behavior.

Q: Does it extract audio to speakers? 
A: No. Dedicated audio extraction is not listed for this model.

Q: Does it have optical audio output? 
A: No. Optical audio output is not listed.

Q: Does it have analog audio output? 
A: No. Analog audio output is not listed.

Q: What audio formats are supported through HDMI? 
A: The manual lists LPCM 7.1CH, Dolby TrueHD, and DTS-HD Master Audio.

Q: Does it support ARC or eARC? 
A: ARC and eARC are not listed.

Q: Does it support IR control? 
A: IR control is not listed.

Q: Does it support RS-232? 
A: RS-232 control is not listed.

Q: Does it have a firmware update port? 
A: Yes. The SERVICE port is a Micro USB-B port for firmware updates.

Q: What power adapter does it use? 
A: It uses a DC 5V/1A power adapter.

Q: What is the maximum power consumption? 
A: Maximum power consumption is 2W.

Q: What HDMI cable length is recommended? 
A: The FAQ recommends using HDMI cables under 30ft, even if they are fiber optic cables.

Q: What should I do if there is no video output? 
A: Try a lower resolution from the media source, try changing the HDMI cables, and try changing the EDID setting.

Q: What should I do if one display has no video? 
A: Check that display’s HDMI cable, selected input, power, and OUT LED. Also test the display on another HDMI output.

Q: What should I do if 4K@60Hz does not work? 
A: Confirm the source and displays support 4K@60Hz, use 18Gbps HDMI cables, keep cables under the recommended distance, and check the EDID setting.

Q: What should I do if audio does not work? 
A: Try STD EDID mode for LPCM 2CH stereo, or confirm the connected display supports the selected HDMI audio format.

Q: Does the UHD-104 need external power? 
A: Yes. Connect the included DC 5V/1A power adapter.