UHD-WPE400R-K Overview and Use Cases

What Is the UHD-WPE400R-K?

The OREI UHD-WPE400R-K is a 4K HDMI and USB-C extender kit with a wall plate Transmitter and receiver box. It extends HDMI or USB-C video from a source device to a remote HDMI display over a single CAT6 / CAT6a cable.

The kit includes a wall plate Transmitter, Receiver, IR Blaster cable, IR Receiver cable, Phoenix connectors, mounting ears, screws, one 24V/1A power adapter, and a user manual. The HDMI source connects to HDMI IN on the wall plate Transmitter, or a compatible laptop / PC connects to USB-C IN. The Receiver connects to the display through HDMI OUT, and CAT6 / CAT6a cable connects the Transmitter HDBaseT OUT to the Receiver HDBT IN.

The UHD-WPE400R-K supports HDMI 2.0b, HDCP 2.2, DP 1.4, and a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4 and 2K@60Hz 4:4:4, HDR, HDR10, HDR10+, Dolby Vision, HLG, USB-C video input, auto input switching, bi-directional IR, RS-232, CEC, Receiver-side analog audio output, and Power over Cable. It extends 4K@60Hz 4:4:4 up to 394ft / 120m and 1080p@60Hz 4:4:4 up to 492ft / 150m over CAT6 / CAT6a cable. 

The UHD-WPE400R-K is useful for conference rooms, classrooms, meeting rooms, home theaters, hotels, offices, wall plate AV installations, presentation systems, and commercial setups where users need a clean wall plate input for HDMI or USB-C sources.

IMPORTANT — UHD-WPE400R-K Has HDMI and USB-C Inputs

The UHD-WPE400R-K wall plate Transmitter includes two source inputs.

This makes the unit useful for rooms where users may connect either a standard HDMI source or a USB-C laptop.

The USB-C source device must support video output over USB-C.

IMPORTANT — Wall Plate Transmitter for Clean Installations

The UHD-WPE400R-K uses a wall plate Transmitter.

This product is designed for clean installations where source inputs are installed in the wall and the Receiver is installed near the display.

IMPORTANT — Supports 4K@60Hz 4:4:4

The UHD-WPE400R-K supports video resolutions up to 4K@60Hz 4:4:4.

To get 4K@60Hz 4:4:4, the source, display, HDMI cable, USB-C device if used, CAT cable, and source output settings must all support the required signal.

IMPORTANT — Maximum Distance Depends on Resolution

The extender delivers stable signal transmission when used within the correct distance range.

Use CAT6 / CAT6a cable for best performance.

Poor cable quality, damaged connectors, weak terminations, couplers, or low-quality patch paths may reduce performance.

IMPORTANT — Use Direct CAT Cable Connection

Connect the Transmitter HDBaseT OUT directly to the Receiver HDBT IN using CAT6 / CAT6a cable.

Do not connect the HDBaseT cable through:

• Network switch 
• Router 
• Internet network 
• LAN switch 
• Standard Ethernet network 

This model requires a direct connection between the Transmitter and Receiver and cannot be connected through a network switch.

IMPORTANT — Auto Input Switching Is Supported

The wall plate Transmitter includes a SOURCE / AUTO button.

This is useful in meeting rooms and classrooms where users may switch between a USB-C laptop and an HDMI source.

IMPORTANT — Power over Cable Is Supported

The UHD-WPE400R-K supports Power over Cable.

Only one side needs the included 24V/1A power adapter.

If the Transmitter has active power, the Receiver does not need a separate power supply. If the Receiver has active power, the Transmitter does not need a separate power supply.

The Transmitter also has a PoC ON / OFF switch to turn Power over Cable on or off.

IMPORTANT — Receiver Has Audio Output

The Receiver includes a 3.5mm AUDIO OUT port.

The L/R audio format is LPCM 2.0CH.

If analog audio does not work, set the HDMI or USB-C source audio output to PCM / Stereo.

IMPORTANT — Bi-Directional IR Is Supported

The UHD-WPE400R-K supports bi-directional IR.

This allows IR control signals to travel in both directions.

Typical source-control setup:

• Connect the IR Receiver cable to IR IN on the Receiver. 
• Place the IR Receiver near the remote display. 
• Connect the IR Blaster cable to IR OUT on the Transmitter. 
• Place the IR Blaster near the source device’s IR window. 

Typical display-control setup:

• Connect an IR Receiver cable to IR IN on the Transmitter. 
• Connect an IR Blaster cable to IR OUT on the Receiver. 
• Place the IR Blaster near the display’s IR window. 

The IR frequency range is 20kHz to 60kHz.

IMPORTANT — RS-232 Control Is Supported

The UHD-WPE400R-K supports RS-232 control.

RS-232 can be used for:

• Display control 
• Projector control 
• Control processor integration 
• Automation systems 
• Serial command workflows 
• Professional AV installations 

IMPORTANT — CEC Is Supported

The UHD-WPE400R-K supports CEC for control compatibility with supported HDMI devices.

CEC behavior depends on the connected source, display, HDMI cable, and device settings.

If CEC does not work reliably, use IR or RS-232 control where available.

IMPORTANT — No HDMI Loop Out Listed

The UHD-WPE400R-K wall plate Transmitter has HDMI IN, USB-C IN, and HDBaseT OUT.

The manual does not list HDMI loop output on the Transmitter.

If a local display is needed near the source, use a compatible HDMI splitter before the Transmitter or choose a model with HDMI loop out.

Ports and Panel Layout

Step-by-Step Setup

1. Install the wall plate Transmitter in the desired wall location. 
2. Connect an HDMI source to HDMI IN on the Transmitter if using HDMI. 
   Examples include a TV box, Blu-ray player, media player, laptop, desktop PC, DVR, or NVR. 
3. Connect a USB-C source to USB-C IN if using a laptop or PC with USB-C video output. 
4. Connect CAT6 / CAT6a cable from HDBaseT OUT on the Transmitter to HDBT IN on the Receiver. 
5. Connect HDMI OUT on the Receiver to the TV, monitor, projector, or display. 
6. Connect the included 24V/1A power adapter to either the Transmitter or the Receiver. 
7. Turn PoC ON if you want the powered unit to power the other side through the CAT cable. 
8. If using audio output, connect Receiver AUDIO OUT to a soundbar, speakers, amplifier, or audio device. 
9. If using IR control, connect the IR Receiver and IR Blaster cables based on the required control direction. 
10. If using RS-232, connect the RS-232 Phoenix connector to the control system or serial device. 
11. Power on the source, display, Transmitter, Receiver, and connected audio/control devices. 
12. Select HDMI or USB-C input using the SOURCE / AUTO button. 
13. Long press SOURCE / AUTO for 3 seconds if auto switching is needed. 
14. Check the HDMI LED, USB-C LED, Power LED, Connection Signal Indicator, and Data Signal Indicator. 
15. Test video, audio, IR control, RS-232, CEC, and PoC operation. 

CAT Cable Requirement — Critical

Use high-quality CAT6 / CAT6a cable.

Poor CAT cable may cause:

• No video 
• Flickering 
• Black screen 
• Poor connection signal indicator status 
• HDBaseT link failure 
• Audio dropouts 
• IR control issues 
• RS-232 issues 
• 4K@60Hz not working 
• PoC power failure 

The troubleshooting section recommends using shielded CAT6 cable if there is no video output on the Receiver.

HDMI Cable Requirement — Critical

Use HDMI cables rated for 18Gbps when using 4K@60Hz 4:4:4.

Poor HDMI cables may cause:

• No picture 
• Flickering 
• Black screen 
• HDR issues 
• Audio dropouts 
• HDCP handshake issues 
• HDMI source not detected 
• Receiver output not detected 

For troubleshooting, test the HDMI source directly with the display before using the extender.

USB-C Requirement — Critical

The USB-C input requires a source device that supports video output through USB-C.

Compatible USB-C sources may include:

• Laptops with USB-C DisplayPort Alt Mode 
• PCs with USB-C video output 
• USB-C devices that support DP video output 

Not every USB-C port outputs video.

If USB-C video does not work, confirm that the laptop or PC supports video over USB-C and that the USB-C cable supports video transmission.

Power Requirement — Critical

The UHD-WPE400R-K uses one DC 24V/1A power adapter.

Only one side normally needs the power adapter when PoC is enabled.

Understanding the Wall Plate Transmitter

The wall plate Transmitter is installed near the HDMI or USB-C source.

It has:

• HDMI IN 
• USB-C IN 
• USB-C LED 
• HDMI LED 
• SOURCE / AUTO button 
• HDBaseT OUT 
• RS-232 
• IR IN 
• IR OUT 
• DC 24V input 
• PoC ON / OFF switch 

The Transmitter lets the user connect either an HDMI device or a USB-C video-capable laptop / PC, then sends the selected signal over CAT cable to the Receiver.

Understanding the Receiver

The Receiver is installed near the remote display.

It has:

• HDBT IN 
• HDMI OUT 
• AUDIO OUT 
• IR IN 
• IR OUT 
• RS-232 
• SERVICE update port 
• DC 24V input 
• Power LED 
• Connection Signal Indicator 
• Data Signal Indicator 

The Receiver converts the HDBaseT signal back to HDMI and provides analog audio output.

Understanding HDMI and USB-C Source Switching

The SOURCE / AUTO button controls which input is active.

This is helpful in rooms where users frequently switch between a fixed HDMI source and a laptop.

Understanding Receiver Audio Output

The Receiver AUDIO OUT port provides analog stereo output.

Use it for:

• Soundbars 
• Powered speakers 
• Amplifiers 
• Conference room audio systems 
• Classroom speakers 
• Local display-side audio 

The supported L/R audio format is LPCM 2.0CH.

Understanding Bi-Directional IR

Bi-directional IR lets remote control signals travel both directions through the extender system.

Use the IR Receiver where the remote will be pointed.

Use the IR Blaster near the device being controlled.

The IR Receiver and Blaster cable definitions are shown on page 14 of the manual, including the IR Blaster signal / power / NC pins and IR Receiver signal / power / grounding pins.

Understanding Signal Indicators

Use these indicators first when troubleshooting.

Supported Video and Audio

The UHD-WPE400R-K supports video formats including:

Supported HDMI audio formats include:

Supported analog audio output:

Supported Technical Specifications

What Source Devices Is the UHD-WPE400R-K Compatible With?

The UHD-WPE400R-K is compatible with HDMI and USB-C source devices such as:

• Laptops with HDMI output 
• Laptops with USB-C video output 
• Desktop PCs with HDMI output 
• PCs with USB-C video output 
• TV boxes 
• Blu-ray players 
• DVD players 
• Cable boxes 
• Satellite receivers 
• Streaming devices 
• Media players 
• Game consoles 
• DVRs 
• NVRs 
• HDMI matrix outputs 
• HDMI switch outputs 

For USB-C, the device must support video output through USB-C.

What Displays Is the UHD-WPE400R-K Compatible With?

The UHD-WPE400R-K can connect to HDMI displays such as:

• 4K TVs 
• 1080p TVs 
• Monitors 
• Projectors 
• Conference room displays 
• Classroom displays 
• Hotel displays 
• Commercial displays 
• Digital signage displays 
• Control room displays 
• Presentation displays 

For 4K@60Hz, the display must support 4K@60Hz input.

What Audio Devices Is the UHD-WPE400R-K Compatible With?

The Receiver AUDIO OUT port can connect to:

• Soundbars 
• Speakers 
• Powered speakers 
• Amplifiers 
• Audio receivers 
• Conference room audio systems 
• Classroom speakers 

Use LPCM / PCM stereo audio for best compatibility with the analog audio output.

Frequently Asked Questions

Q: What is the OREI UHD-WPE400R-K used for? 
A: It is used to extend HDMI or USB-C video, audio, IR, RS-232, CEC, and power over CAT6 / CAT6a cable using a wall plate Transmitter and Receiver.

Q: Does the UHD-WPE400R-K have HDMI input? 
A: Yes. The wall plate Transmitter has HDMI IN.

Q: Does the UHD-WPE400R-K have USB-C input? 
A: Yes. It has USB-C IN for laptops and PCs that support video output through USB-C.

Q: Does every USB-C laptop work with it? 
A: No. The laptop or PC must support video output over USB-C.

Q: Is the Transmitter a wall plate? 
A: Yes. The Transmitter is a wall plate unit designed for clean installations.

Q: Does it support 4K@60Hz? 
A: Yes. It supports up to 4K@60Hz 4:4:4.

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 2.0b.

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

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

Q: Does it support HDR? 
A: Yes. It supports HDR, HDR10, HDR10+, Dolby Vision, and HLG.

Q: How far can it extend 4K@60Hz? 
A: It extends 4K@60Hz 4:4:4 up to 120m / 394ft over CAT6 / CAT6a cable.

Q: How far can it extend 1080p@60Hz? 
A: It extends 1080p@60Hz 4:4:4 up to 150m / 492ft over CAT6 / CAT6a cable.

Q: What CAT cable should I use? 
A: Use high-quality CAT6 or CAT6a cable. Shielded CAT6 is recommended for troubleshooting no-video issues.

Q: Can I connect it through a network switch? 
A: No. This model requires a direct connection between the Transmitter and Receiver.

Q: Is this AV over IP? 
A: No. It is a direct HDBaseT-style extender connection, not an AV-over-IP system.

Q: Does it support Power over Cable? 
A: Yes. It supports Power over Cable and includes a PoC ON / OFF switch.

Q: Do both units need power adapters? 
A: No. Only one side needs the included 24V/1A power adapter when PoC is enabled.

Q: Can the power adapter connect to either the Transmitter or Receiver? 
A: Yes. The Transmitter can power the Receiver, or the Receiver can power the Transmitter.

Q: Does the Transmitter have HDMI loop out? 
A: No HDMI loop output is listed for this model.

Q: Does the Receiver have audio output? 
A: Yes. The Receiver has a 3.5mm AUDIO OUT port.

Q: What audio format is supported from AUDIO OUT? 
A: The analog L/R audio output supports LPCM 2.0CH.

Q: Does it support Dolby Atmos? 
A: Dolby Atmos is not listed in this manual.

Q: Does it support DTS:X? 
A: Yes. DTS:X is listed as supported.

Q: What HDMI audio formats are supported? 
A: It supports LPCM up to 7.1, Dolby Digital, Dolby TrueHD, Dolby Digital Plus, DTS-ES, DTS HD Master, DTS HD-HRA, and DTS:X.

Q: Does it support auto input switching? 
A: Yes. Long press the SOURCE / AUTO button for 3 seconds to enable or disable auto switching.

Q: How do I switch between HDMI and USB-C? 
A: Press the SOURCE / AUTO button on the wall plate Transmitter.

Q: What does the USB-C LED mean? 
A: The green USB-C LED lights when USB-C is selected as the input.

Q: What does the HDMI LED mean? 
A: The green HDMI LED lights when HDMI is selected as the input.

Q: What does the blue auto indicator mean? 
A: The blue indicator means auto switching is enabled.

Q: Does it support IR control? 
A: Yes. It supports bi-directional IR control.

Q: What IR frequency is supported? 
A: It supports wideband IR from 20kHz to 60kHz.

Q: What is the IR receiving distance? 
A: The manual lists 0–5m at ±45° and 0–8m at ±90° between the IR Receiver and the remote control.

Q: Does it support RS-232? 
A: Yes. It supports RS-232 control through the Transmitter and Receiver.

Q: Does it support CEC? 
A: Yes. CEC is supported.

Q: What should I do if there is no video output on the Receiver? 
A: Check the green and yellow lights on the Receiver CAT port, try changing the CAT cable, use shielded CAT6 cable, and try lowering the source resolution.

Q: What should I do if the Connection Signal Indicator is flashing? 
A: The Transmitter and Receiver are in poor connection status. Check CAT cable quality, terminations, cable length, and direct connection.

Q: What should I do if the Connection Signal Indicator is off? 
A: The Transmitter and Receiver are not connected. Check that HDBaseT OUT is connected directly to HDBT IN.

Q: What should I do if the Data Signal Indicator is off? 
A: No HDMI signal is detected. Check the selected input, source device, HDMI or USB-C cable, source output settings, and display connection.

Q: What should I do if 4K@60Hz does not work? 
A: Use 18Gbps HDMI cables, confirm the USB-C or HDMI source supports 4K@60Hz, use high-quality CAT6 / CAT6a cable within 120m / 394ft, and test with a lower resolution first.

Q: What should I do if USB-C input does not work? 
A: Confirm that the laptop or PC supports USB-C video output, use a USB-C cable that supports video, select USB-C input, and check that the USB-C LED turns on.

Q: What should I do if analog audio output does not work? 
A: Set the source audio output to LPCM / PCM stereo and check the AUDIO OUT cable and audio device input.

Q: What should I do if IR control does not work? 
A: Confirm the IR Receiver and IR Blaster are connected in the correct direction and that the IR Blaster is placed near the controlled device’s IR sensor.

Q: What should I do if RS-232 does not work? 
A: Check Phoenix connector wiring, serial settings, and the connected control devices on both ends.

Q: Does the UHD-WPE400R-K need external power? 
A: Yes. Connect the included DC 24V/1A power adapter to either the wall plate Transmitter or the Receiver. The other unit can be powered through Power over Cable.