What Is the HD-EX104?
The OREI HD-EX104 is a 1x4 HDMI splitter extender over CAT5e / CAT6 LAN cable. It takes one HDMI source and distributes the same HDMI signal to up to four HDMI displays using compatible ProLNK receiver devices.
The HDMI source connects to the HDMI input on the HD-EX104 Transmitter. The four RJ45 outputs connect to receiver units using CAT cable, and each receiver connects to a TV, projector, or monitor through HDMI.
The HD-EX104 supports one HDMI input to four HDMI outputs, HDCP compliance, Full HD video, IR signal transmission, plug-and-play setup, cascade connection using a LAN switch or router, and transmission distance up to 400ft over CAT6 cable. The manual lists supported resolutions including 480i@60Hz, 480p@60Hz, 576i@50Hz, 576p@50Hz, 720p@50/60Hz, 1080i@50/60Hz, and 1080p@50/60Hz.
The HD-EX104 is useful for digital signage, monitoring systems, exhibition centers, TV displays, classrooms, retail displays, and setups where one HDMI source needs to be shown on multiple displays over long CAT cable runs.
IMPORTANT — HD-EX104 Is a 1x4 HDMI Splitter Extender
The HD-EX104 distributes one HDMI source to four displays.
| Function | Support |
| 1 HDMI input | Supported |
| 4 RJ45 outputs | Supported |
| 4 HDMI display locations | Supported with compatible receivers |
| Same image on all displays | Supported |
| Extended desktop across displays | Not supported |
This product duplicates the same HDMI source. It does not create separate independent video outputs.
IMPORTANT — Supports Full HD, Not 4K
The HD-EX104 supports Full HD video up to 1080p.
Supported resolutions include:
| Resolution | Support |
| 480i@60Hz | Supported |
| 480p@60Hz | Supported |
| 576i@50Hz | Supported |
| 576p@50Hz | Supported |
| 720p@50/60Hz | Supported |
| 1080i@50/60Hz | Supported |
| 1080p@50/60Hz | Supported |
It does not support:
- 4K
- 4K@60Hz
- 8K
For 4K distribution, use a 4K HDMI splitter extender model.
IMPORTANT — Maximum Distance Depends on CAT Cable Type
The HD-EX104 supports different distances depending on the cable type.
| Cable Type | Maximum Distance |
| CAT5 | 250ft |
| CAT5e | 330ft |
| CAT6 | 400ft |
For the longest distance, use high-quality CAT6 cable.
Poor cable quality, damaged connectors, bad terminations, or long patching paths can reduce performance.
IMPORTANT — Compatible ProLNK Receivers Are Required
The manual states that the HD-EX104 is compatible with ProLNK receiver devices.
The HD-EX104 Transmitter sends signal through RJ45 outputs, but each display still requires a compatible HDMI extender receiver.
Each receiver connects to:
- CAT cable from the HD-EX104
- HDMI display
- IR receiver cable if IR control is needed
IMPORTANT — Supports Cascade Connection Using LAN Switch or Router
The manual lists cascade connection support using a LAN switch or router.
It also says the product is compatible with an existing LAN network without affecting internet connection.
For best results, use proper network cabling and make sure the receivers are compatible with the HD-EX104 / ProLNK system.
IMPORTANT — IR Control Is Supported
The HD-EX104 supports IR signal transmission to control the HDMI source from the display side.
Typical setup:
- Connect the IR Blaster extension cable to the IR extender out port on the HD-EX104 Transmitter.
- Place the IR Blaster near the HDMI source device’s IR window.
- Connect the IR Receiver cable on the receiver side.
- Point the source remote at the receiver-side IR Receiver.
The manual lists IR signal support for 20–60kHz IR devices.
IMPORTANT — Use the Included 5V Power Adapter
The HD-EX104 uses a 5V/2A power supply.
The manual notes to power the device using the included 5V DC power supply adapter only. If another adapter is used, the specifications must be identical.
Poor or incorrect power may cause:
- No signal
- Unstable transmission
- Power LED not lighting
- Receiver connection issues
- Intermittent video
IMPORTANT — Do Not Disconnect LAN or IR Cables While in Use
The manual safety notes say not to disconnect or connect LAN cables and IR cables while the device is in use.
Power off the system before changing LAN or IR wiring.
Ports and Panel Layout
| Port / Button / Indicator | Function |
| HDMI Input | Connect HDMI source device |
| RJ45 Outputs | Connect CAT cable to compatible receiver units |
| IR Blaster Extension Port | Connect IR Blaster cable for source control |
| Power Input | Connect 5V power adapter |
| Reset Button | Resets the unit if signal is unstable |
| Signal Link LEDs | Show connection / signal status |
| Data Transmission Light | Shows data transmission activity |
Step-by-Step Setup
- Connect the HDMI source device to the HDMI input on the HD-EX104 Transmitter.
Examples include a DVD player, set-top box, media player, DVR, NVR, or computer. - Connect IR Blaster extension cable to the IR extender out port if IR control is needed.
- Place the IR Blaster near the source device’s IR sensor.
- Connect RJ45 outputs from the HD-EX104 Transmitter to compatible receiver units using CAT5e / CAT6 cable.
- Connect HDMI output from each receiver to the HDMI input on the TV, projector, or monitor.
- Connect the included 5V/2A power adapter to the HD-EX104.
- Power on the HDMI source and displays.
- Check the power and signal indicator LEDs.
- Test video on all displays and IR control if used.
CAT Cable Requirement — Critical
Use properly terminated CAT cable following the IEEE-568B standard.
| Cable Type | Maximum Distance |
| CAT5 | 250ft |
| CAT5e | 330ft |
| CAT6 | 400ft |
Poor CAT cable may cause:
- No video
- Waiting for connection
- Unstable display
- Signal dropouts
- IR control failure
- Shorter working distance
Use quality cable and make sure all cable ends are firmly connected.
HDMI Cable Requirement — Critical
Use good-quality HDMI cables for:
- Source to HD-EX104 HDMI input
- Receiver HDMI output to display
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- No sound
- HDCP handshake issues
- Wrong resolution
For troubleshooting, test the HDMI source directly with a display first.
Power Requirement — Critical
The HD-EX104 requires 5V/2A power.
| Power Requirement | Value |
| Power Supply | 5V/2A |
| Power Consumption | Less than 10W |
Use the included adapter or an adapter with identical specifications.
Understanding the Transmitter
The HD-EX104 Transmitter is installed near the HDMI source.
It has:
- HDMI input
- Four RJ45 outputs
- IR Blaster extension port
- Power input
- Reset button
- Signal link LEDs
- Data transmission light
The Transmitter splits the HDMI source and sends the signal through CAT cable to compatible receivers.
Understanding the Receiver Side
Each receiver is installed near a display.
Each receiver connects to:
- CAT cable from the HD-EX104
- HDMI display
- IR Receiver cable if IR control is needed
The receiver converts the transmitted signal back to HDMI for the display.
Understanding Cascade / LAN Switch Use
The manual lists support for cascade connection using a LAN switch or router.
This can help distribute the signal beyond a simple point-to-point wiring setup.
Important: Use compatible receivers and proper network cabling. If video does not appear, test a direct connection first before using a switch or router.
Understanding IR Control
IR control lets the user control the HDMI source from the display location.
Typical setup:
| IR Cable | Connection | Placement |
| IR Blaster | HD-EX104 IR extender out | Near HDMI source device |
| IR Receiver | Receiver side | Near display where remote will point |
Use the remote control for the HDMI source device.
Troubleshooting
| Issue | What to Check |
| TV shows “waiting for connection” | Check receiver power, cable connection, and whether all cables are firmly connected |
| TV shows “please check the power supply of the unit” | Check Transmitter and Receiver power |
| TV shows “please check the TX input signal” | Check HDMI source, HDMI cable, and source output |
| Display is not fluent or stable | Check cable length, restart unit, or press reset button and reconnect |
| No video on one display | Check that receiver, HDMI cable, CAT cable, and display input |
| IR not working | Check IR Blaster and IR Receiver placement and connections |
Supported Technical Specifications
| Specification | Support |
| Product Type | 1x4 HDMI splitter extender over CAT cable |
| HDMI Input | 1 |
| RJ45 Outputs | 4 |
| HDMI Signal | Compatible with HDCP |
| Transport Protocol | ProLNK |
| Supported Resolution | Up to 1080p@50/60Hz |
| IR Signal | 20–60kHz IR device support |
| CAT5 Distance | 250ft |
| CAT5e Distance | 330ft |
| CAT6 Distance | 400ft |
| Cascade Support | Supported using LAN switch or router |
| Power Supply | 5V/2A |
| Power Consumption | Less than 10W |
| Working Temperature | 0°C–60°C |
| Dimensions | 252mm x 97.5mm x 25mm |
| Weight | 535g |
| Color | Black |
What Source Devices Is the HD-EX104 Compatible With?
The HD-EX104 is compatible with HDMI source devices such as:
- DVD players
- Set-top boxes
- Media players
- DVRs
- NVRs
- Computers with HDMI output
- HD monitoring equipment
- HDMI source devices with supported 1080p output
The source must output a supported HDMI resolution.
What Displays Is the HD-EX104 Compatible With?
The HD-EX104 can connect to HDMI displays through compatible receivers, including:
- HDTVs
- Monitors
- Projectors
- Digital signage displays
- Exhibition displays
- Monitoring displays
- Commercial displays
The display must support the selected HDMI output resolution.
Frequently Asked Questions
Q: What is the OREI HD-EX104 used for?
A: The HD-EX104 is used to split one HDMI source to four HDMI displays over CAT5e / CAT6 cable using compatible receiver devices.
Q: Is the HD-EX104 a splitter or extender?
A: It is both. It splits one HDMI signal and extends it over CAT cable to multiple displays.
Q: How many HDMI inputs does it have?
A: It has one HDMI input.
Q: How many outputs does it have?
A: It has four RJ45 outputs for compatible receivers.
Q: Does it support 4K?
A: No. The manual lists support up to Full HD 1080p.
Q: Does it support 1080p?
A: Yes. It supports 1080p@50/60Hz.
Q: What is the maximum distance?
A: Up to 400ft over CAT6, 330ft over CAT5e, or 250ft over CAT5.
Q: What CAT cable should I use?
A: Use CAT6 for maximum distance, or CAT5e / CAT5 for shorter distances.
Q: Does it require receiver units?
A: Yes. It works with compatible ProLNK receiver devices.
Q: Can it work with a LAN switch or router?
A: Yes. The manual lists cascade connection support using a LAN switch or router.
Q: Does it affect internet connection on an existing LAN network?
A: The manual says it is compatible with an existing LAN network without affecting internet connection.
Q: Does it support IR control?
A: Yes. It supports IR signal transmission for 20–60kHz IR devices.
Q: Which IR cable goes on the Transmitter?
A: The IR Blaster extension cable connects to the IR extender out port on the Transmitter.
Q: What power adapter does it use?
A: It uses a 5V/2A power adapter.
Q: Should I use the included power adapter?
A: Yes. The manual recommends using the included 5V DC adapter only, or an adapter with identical specifications.
Q: What should I do if the TV says “waiting for connection”?
A: Check that the receiver power LED is on and that all cables are firmly connected.
Q: What should I do if the TV says “please check the TX input signal”?
A: Check whether the HDMI source is outputting signal. Try reconnecting the HDMI cable or changing the source device.
Q: What should I do if the display is unstable?
A: Check the cable length between the Transmitter and receiver. If it is within range, press the reset button and reconnect.
Q: Can I disconnect LAN or IR cables while it is running?
A: No. The manual says not to disconnect or connect LAN cables and IR cables while the device is in use.
Q: Does the HD-EX104 need external power?
A: Yes. Connect the included 5V/2A power adapter to the Transmitter.
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