What Is the UHDS-PRO108?
The OREI UHDS-PRO108 is a professional 4K@60Hz 1x8 HDMI splitter. It takes one HDMI source and duplicates the same signal to eight HDMI displays at the same time.
The HDMI source connects to HDMI IN on the splitter, and up to eight TVs, monitors, projectors, or displays connect to HDMI OUT 1 through HDMI OUT 8.
The UHDS-PRO108 supports HDMI 2.0 and HDCP 2.2, with video bandwidth up to 18Gbps. It supports video resolutions up to 4K@60Hz, HDR, HDR10, HDR10+, Dolby Vision, HLG, automatic 4K to 1080p downscaling, COPY / AUTO EDID management, CEC support on OUT 1, and HDMI audio formats including PCM 2CH, LPCM 5.1 / 7.1CH, Dolby Digital, DTS 5.1, Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X. The application diagram shows one DVD or Blu-ray player connected to HDMI IN and distributed to multiple displays such as TV 1 through TV 8.
The UHDS-PRO108 is useful for retail displays, control rooms, restaurants, bars, classrooms, conference rooms, churches, trade shows, digital signage, home entertainment systems, and any setup where one HDMI source needs to be shown on up to eight displays.
IMPORTANT — UHDS-PRO108 Is a 1x8 HDMI Splitter
The UHDS-PRO108 duplicates one HDMI source to eight HDMI outputs.
| Function | Support |
| 1 HDMI input | Supported |
| 8 HDMI outputs | Supported |
| Same source on all displays | Supported |
| Different source on each display | Not supported |
| Matrix switching | Not supported |
| Extended desktop creation | Not supported |
| Audio extraction | Not supported |
This product mirrors one HDMI source. It does not create independent video outputs and does not extend a PC desktop across multiple screens.
IMPORTANT — Supports 4K@60Hz
The UHDS-PRO108 supports video resolutions up to 4K@60Hz.
| Feature | Support |
| 4K@60Hz | Supported |
| HDMI 2.0 | Supported |
| HDCP 2.2 | Supported |
| Video bandwidth | 18Gbps |
| HDR | Supported |
| HDR10 | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
To get 4K@60Hz, the HDMI source, HDMI cables, displays, and EDID setting must all support the required signal.
IMPORTANT — Automatic 4K to 1080p Downscaling Is Supported
The UHDS-PRO108 supports automatic downscaling on all outputs.
This means a 4K source can be sent to both 4K and 1080p displays in the same system.
| Display Type | Output Behavior |
| 4K display | Receives 4K signal when supported |
| 1080p display | Receives downscaled 1080p signal |
| Mixed 4K and 1080p displays | Supported using downscaling behavior |
This is useful when some displays support 4K and others only support 1080p.
IMPORTANT — COPY and AUTO EDID Modes Are Included
The UHDS-PRO108 includes an EDID dial switch with COPY and AUTO modes.
| EDID Mode | Function |
| COPY | Sends the EDID of the OUT 1 display to the source |
| AUTO | Compares all connected displays and sends the lowest common audio/video format to all outputs |
Use COPY mode when HDMI OUT 1 is the main display and should control the source output.
Use AUTO mode when multiple displays have different capabilities and you want the splitter to choose a format compatible with all connected displays.
IMPORTANT — COPY Mode Downscaling Behavior
In COPY mode, the EDID of the display connected to HDMI OUT 1 is sent to the source.
The manual’s page 9 diagram shows a 4K source connected to the splitter, with 4K displays receiving 4K bypass and 1080p displays receiving 1080p downscaling.
| Connected Display | COPY Mode Behavior |
| 4K display | 4K bypass |
| 1080p display | 1080p downscaling |
This allows each output to receive the proper HDMI signal according to the connected display’s EDID.
IMPORTANT — AUTO Mode Downscaling Behavior
In AUTO mode, the splitter compares the EDID of all connected displays and outputs the lowest common format.
The manual’s page 10 diagram shows a 4K source being downscaled to 1080p for all outputs when both 4K and 1080p displays are connected.
| Setup | AUTO Mode Behavior |
| All displays support 4K | 4K output possible |
| Mixed 4K and 1080p displays | Outputs common compatible format, such as 1080p |
| Lowest common resolution needed | AUTO mode is recommended |
Use AUTO mode when display compatibility is more important than keeping 4K output on specific displays.
IMPORTANT — CEC Is Supported on OUT 1
The UHDS-PRO108 supports CEC functionality on HDMI OUT 1.
| CEC Feature | Support |
| CEC on OUT 1 | Supported |
| CEC on all outputs | Not listed |
| Control through source remote | Supported on OUT 1 according to the manual |
CEC behavior depends on the HDMI source, display, HDMI cable, and CEC settings on the connected devices.
IMPORTANT — HDMI Audio Pass-Through Is Supported
The UHDS-PRO108 supports HDMI audio pass-through.
Supported HDMI audio formats include:
| Supported HDMI Audio |
| PCM 2CH |
| LPCM 5.1CH |
| LPCM 7.1CH |
| Dolby Digital |
| DTS 5.1 |
| Dolby Digital Plus |
| Dolby TrueHD |
| DTS-HD Master Audio |
| Dolby Atmos |
| DTS:X |
The connected HDMI source, displays, AVR, soundbar, or audio system must also support the selected audio format.
IMPORTANT — This Is Not an Audio Extractor
The UHDS-PRO108 passes HDMI audio through the HDMI outputs.
It does not provide separate audio extraction ports.
| Audio Feature | Support |
| HDMI audio pass-through | Supported |
| Analog audio output | Not supported |
| Optical audio output | Not supported |
| Coaxial audio output | Not supported |
| ARC / eARC extraction | Not supported |
If you need separate audio output to speakers, amplifier, or soundbar, use an HDMI audio extractor or a splitter model with dedicated audio extraction.
Ports and Panel Layout
| Port / Indicator / Switch | Function |
| Power LED | Blue LED lights when the device is powered on |
| IN LED | Blue LED lights when the media source is connected |
| OUT 1–8 LEDs | Green LEDs light when displays are connected |
| SERVICE | USB-C firmware update port |
| EDID Dial Switch | Selects COPY or AUTO EDID mode |
| HDMI OUT 1–8 | Connect HDMI displays such as TVs or monitors |
| HDMI IN | Connect HDMI source device |
| DC 5V | Connect the included power adapter |
Step-by-Step Setup
- Connect the HDMI source device to HDMI IN on the UHDS-PRO108.[Text Wrapping Break]Examples include a DVD player, Blu-ray player, cable box, satellite receiver, streaming device, laptop, desktop PC, DVR, NVR, or HDMI matrix output.
- Connect HDMI OUT 1 to the first display.
- Connect HDMI OUT 2 through HDMI OUT 8 to additional displays as needed.
- Connect the included power adapter to the splitter.
- Set the EDID dial switch to COPY or AUTO.
- Power on the HDMI source, displays, and splitter.
- Check the Power LED.
- Check the IN LED to confirm the source is connected.
- Check OUT 1–8 LEDs to confirm connected displays are detected.
- Test video and HDMI audio on all connected displays.
HDMI Cable Requirement — Critical
Use high-quality HDMI cables rated for the resolution being used.
| Resolution | Recommended HDMI Cable Length |
| 4K60 | Up to 8m / 26ft |
| 1080p | Up to 15m / 49ft |
| General best practice | Under 30ft |
The manual recommends Premium High Speed HDMI cables.
Poor HDMI cables may cause:
- No video
- Flickering
- Black screen
- One output not working
- 4K@60Hz not working
- HDR issues
- Dolby Vision issues
- HDCP handshake issues
- Audio dropouts
For troubleshooting, test each HDMI cable directly between the source and display.
Power Requirement — Critical
The UHDS-PRO108 uses a DC power adapter.
| Power Detail | Value |
| Power adapter input | AC 100–240V, 50/60Hz |
| Power adapter output | DC 12V/1A |
| Maximum power consumption | 6.4W |
If the Power LED does not light, check the power adapter, outlet, and DC power connection.
Understanding COPY EDID Mode
COPY mode sends the EDID of the display connected to HDMI OUT 1 to the media source.
Use COPY mode when:
- HDMI OUT 1 is the main display
- You want the source to follow the display connected to OUT 1
- You want per-output downscaling behavior for mixed 4K and 1080p displays
In COPY mode, 4K displays can receive 4K bypass while 1080p displays receive downscaled 1080p.
Understanding AUTO EDID Mode
AUTO mode compares the EDID of all connected displays.
Use AUTO mode when:
- Displays have different resolution or audio capabilities
- You want the most compatible shared format
- Some displays do not show video in COPY mode
- A stable common output is preferred
In AUTO mode, if a 1080p display is part of the system, the splitter may output 1080p to all displays as the lowest common format.
Understanding Auto Downscaling
Auto downscaling helps make a 4K source compatible with 1080p displays.
This is useful in mixed-display installations such as:
- Retail walls with old and new TVs
- Restaurants with mixed display models
- Classrooms with 4K and 1080p screens
- Conference rooms with different display generations
- Digital signage systems with mixed display resolutions
Downscaling changes video resolution only. It does not upgrade a 1080p display to 4K.
Understanding the Application Example
The application diagram on page 11 shows a DVD or Blu-ray player connected to HDMI IN on the UHDS-PRO108. The splitter then sends the same HDMI signal to multiple displays, including TV 1 through TV 8.
This demonstrates the main use case: one HDMI source distributed to up to eight HDMI displays at the same time.
Supported Video and Audio
The UHDS-PRO108 supports video formats including:
| Supported Video |
| 480i |
| 480p |
| 576i |
| 576p |
| 720p |
| 1080p@50/60Hz |
| 4Kx2K@24/30Hz |
| 4Kx2K@60Hz |
| RGB |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| 8-bit |
| 10-bit |
| 12-bit |
| HDR |
| HDR10 |
| HDR10+ |
| Dolby Vision |
| HLG |
Supported HDMI audio formats include:
| Supported HDMI Audio |
| PCM 2CH |
| LPCM 5.1CH |
| LPCM 7.1CH |
| Dolby Digital |
| DTS 5.1 |
| Dolby Digital Plus |
| Dolby TrueHD |
| DTS-HD Master Audio |
| Dolby Atmos |
| DTS:X |
Supported Technical Specifications
| Specification | Support |
| Product Type | 4K@60Hz 1x8 HDMI splitter |
| HDMI Version | HDMI 2.0 |
| HDCP Version | HDCP 2.2 |
| Video Bandwidth | 18Gbps |
| Maximum Resolution | 4K@60Hz |
| HDR | HDR, HDR10, HDR10+, Dolby Vision, HLG |
| Color Depth | 8-bit, 10-bit, 12-bit |
| Color Space | RGB, YCbCr 4:4:4, YCbCr 4:2:2 |
| HDMI Audio | PCM 2CH, LPCM 5.1 / 7.1CH, Dolby Digital, DTS 5.1, Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, DTS:X |
| HDMI Input | 1 x HDMI Type-A 19-pin female |
| HDMI Outputs | 8 x HDMI Type-A 19-pin female |
| EDID Management | COPY / AUTO dial switch |
| Downscaling | Automatic 4K to 1080p downscaling |
| CEC | Supported on OUT 1 |
| Firmware Update | USB-C SERVICE port |
| Audio Extraction | Not supported |
| Power Supply | DC 12V/1A |
| Power Consumption | 6.4W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 242mm x 102mm x 16mm |
| Weight | 588g / 20.74oz |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Operating Humidity | 20%–80% RH, non-condensing |
| Storage Humidity | 10%–90% RH, non-condensing |
| ESD Protection | ±8kV air-gap, ±4kV contact |
What Source Devices Is the UHDS-PRO108 Compatible With?
The UHDS-PRO108 is compatible with HDMI source devices such as:
- DVD players
- Blu-ray players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- Desktop PCs
- Laptops with HDMI output
- DVRs
- NVRs
- Game consoles
- HDMI switch outputs
- HDMI matrix outputs
- AV receivers with HDMI output
The source must output a supported HDMI resolution up to 4K@60Hz.
What Displays Is the UHDS-PRO108 Compatible With?
The UHDS-PRO108 can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Monitors
- Projectors
- Commercial displays
- Digital signage displays
- Classroom displays
- Conference room displays
- Restaurant TVs
- Bar displays
- Retail displays
- Trade show screens
- Worship facility displays
- Control room monitors
For 4K use, the display must support the selected 4K input format.
Frequently Asked Questions
Q: What is the OREI UHDS-PRO108 used for?[Text Wrapping Break]A: It is used to split one HDMI source to eight HDMI displays.
Q: Is the UHDS-PRO108 a splitter or extender?[Text Wrapping Break]A: It is an HDMI splitter. It does not extend HDMI over CAT cable by itself.
Q: How many HDMI inputs does it have?[Text Wrapping Break]A: It has one HDMI input.
Q: How many HDMI outputs does it have?[Text Wrapping Break]A: It has eight HDMI outputs.
Q: Does it show the same content on all displays?[Text Wrapping Break]A: Yes. All connected displays show the same HDMI source.
Q: Can it show different content on each display?[Text Wrapping Break]A: No. It duplicates one HDMI input to all outputs.
Q: Can it extend my computer desktop across eight screens?[Text Wrapping Break]A: No. It mirrors the same PC screen to multiple displays. It does not create extended desktop screens.
Q: Does the UHDS-PRO108 support 4K@60Hz?[Text Wrapping Break]A: Yes. It supports up to 4K@60Hz.
Q: Does it support 8K?[Text Wrapping Break]A: No. It supports up to 4K@60Hz.
Q: Does it support 4K@120Hz?[Text Wrapping Break]A: No. It does not support 4K@120Hz.
Q: What HDMI version does it support?[Text Wrapping Break]A: It supports HDMI 2.0.
Q: What HDCP version does it support?[Text Wrapping Break]A: It supports HDCP 2.2.
Q: What video bandwidth does it support?[Text Wrapping Break]A: It supports 18Gbps video bandwidth.
Q: Does it support HDR?[Text Wrapping Break]A: Yes. It supports HDR, HDR10, HDR10+, Dolby Vision, and HLG.
Q: Does it support Dolby Vision?[Text Wrapping Break]A: Yes. Dolby Vision is supported.
Q: Does it support HLG?[Text Wrapping Break]A: Yes. HLG is supported.
Q: Does it support EDID management?[Text Wrapping Break]A: Yes. It includes COPY and AUTO EDID modes.
Q: What is COPY EDID mode?[Text Wrapping Break]A: COPY mode sends the EDID of the display connected to OUT 1 to the media source.
Q: What is AUTO EDID mode?[Text Wrapping Break]A: AUTO mode compares all connected display EDIDs and sends the lowest common audio/video format to all outputs.
Q: Which output is used for EDID copy?[Text Wrapping Break]A: HDMI OUT 1 is used for COPY EDID mode.
Q: Does the UHDS-PRO108 support downscaling?[Text Wrapping Break]A: Yes. It supports automatic 4K to 1080p downscaling.
Q: Can I use mixed 4K and 1080p displays?[Text Wrapping Break]A: Yes. The splitter supports downscaling for mixed 4K and 1080p display setups.
Q: What happens in COPY mode with mixed 4K and 1080p displays?[Text Wrapping Break]A: The splitter can pass 4K to 4K displays and downscale to 1080p for 1080p displays.
Q: What happens in AUTO mode with mixed 4K and 1080p displays?[Text Wrapping Break]A: The splitter compares all connected displays and may output the lowest common format, such as 1080p, to all outputs.
Q: Does it support CEC?[Text Wrapping Break]A: Yes. CEC is supported on OUT 1.
Q: Does it support Dolby Atmos?[Text Wrapping Break]A: Yes. Dolby Atmos is listed as supported through HDMI audio pass-through.
Q: Does it support DTS:X?[Text Wrapping Break]A: Yes. DTS:X is listed as supported.
Q: What audio formats are supported?[Text Wrapping Break]A: It supports PCM 2CH, LPCM 5.1 / 7.1CH, Dolby Digital, DTS 5.1, Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X.
Q: Does it extract audio to speakers?[Text Wrapping Break]A: No. Dedicated audio extraction is not listed for this model.
Q: Does it have optical audio output?[Text Wrapping Break]A: No. Optical audio output is not listed.
Q: Does it have analog audio output?[Text Wrapping Break]A: No. Analog audio output is not listed.
Q: Does it support ARC or eARC?[Text Wrapping Break]A: ARC and eARC are not listed for this model.
Q: Does it support IR control?[Text Wrapping Break]A: IR control is not listed for this model.
Q: Does it support RS-232?[Text Wrapping Break]A: RS-232 control is not listed for this model.
Q: Does it have a firmware update port?[Text Wrapping Break]A: Yes. It has a USB-C SERVICE port for firmware updates.
Q: What does the Power LED mean?[Text Wrapping Break]A: The blue Power LED lights when the device is powered on.
Q: What does the IN LED mean?[Text Wrapping Break]A: The blue IN LED lights when the media source is connected.
Q: What do the OUT LEDs mean?[Text Wrapping Break]A: The corresponding green OUT LEDs light when displays are connected.
Q: What power adapter does it use?[Text Wrapping Break]A: It uses a DC 12V/1A power adapter.
Q: What is the maximum power consumption?[Text Wrapping Break]A: Maximum power consumption is 6.4W.
Q: What HDMI cable length is recommended?[Text Wrapping Break]A: The manual lists up to 8m / 26ft for 4K60 and 15m / 49ft for 1080p. It also recommends Premium High Speed HDMI cables.
Q: What should I do if there is no video output?[Text Wrapping Break]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?[Text Wrapping Break]A: Check that output’s HDMI cable, display input, display power, and OUT LED. Also test the display on another HDMI output.
Q: What should I do if all displays have no video?[Text Wrapping Break]A: Check the power adapter, HDMI source, HDMI IN cable, EDID setting, and IN LED.
Q: What should I do if 4K@60Hz does not work?[Text Wrapping Break]A: Use Premium High Speed HDMI cables, confirm the source and display support 4K@60Hz, keep HDMI cables within the recommended length, and try COPY or AUTO EDID mode.
Q: What should I do if mixed 4K and 1080p displays are connected?[Text Wrapping Break]A: Use COPY mode if you want compatible per-output downscaling, or AUTO mode if you want the splitter to select the lowest common format for all displays.
Q: What should I do if audio does not work?[Text Wrapping Break]A: Try AUTO EDID mode, confirm the connected displays and source support the selected HDMI audio format, or test with PCM stereo.
Q: Does the UHDS-PRO108 need external power?[Text Wrapping Break]A: Yes. Connect the included DC power adapter to the splitter.
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