WHD-165-K Overview and Use Cases

What Is the WHD-165-K?

The OREI WHD-165-K is a 1080p@60Hz wireless HDMI extender kit with IR passback. It sends HDMI video and audio wirelessly from one HDMI source to one or more HDMI displays.

The kit includes a Transmitter and Receiver. The HDMI source connects to the Transmitter HDMI input, the remote display connects to the Receiver HDMI output, and the HDMI signal is sent wirelessly between both units.

The WHD-165-K supports HDMI 1.3 and HDCP 1.4, with a maximum transfer rate of 4.96Gbps. It supports video resolutions up to 1080p@60Hz and 1920x1200, HDMI loop out on the Transmitter, IR passback, SSID pairing, channel switching, 5.18–5.24GHz wireless frequency bands, firmware upgrade through Micro USB, stable 24/7 operation, and up to 1-to-4 wireless transmission.

The WHD-165-K is useful for video conferences, home entertainment, multimedia education, classrooms, conference rooms, digital signage, presentations, and installations where running HDMI cable is difficult.

IMPORTANT — WHD-165-K Supports 1080p@60Hz, Not 4K

The WHD-165-K supports video resolutions up to 1080p@60Hz and 1920x1200.

It does not support:

1. 4K
2. 4K@60Hz
3. 4K@120Hz
4. 8K 
    
   For 4K wireless HDMI, use a wireless model that specifically supports 4K.

IMPORTANT — WHD-165-K Supports up to 1-to-4 Wireless Transmission

The WHD-165-K supports up to one Transmitter sending signal to four Receivers.

Supported connection types include:

This makes it useful when one HDMI source needs to be shown on multiple displays wirelessly.

IMPORTANT — Transmission Distance Depends on Number of Receivers

The WHD-165-K wireless distance changes depending on how many Receivers are used.

These distances are based on line-of-sight conditions.

Walls, cabinets, metal objects, wireless interference, and obstacles can reduce performance.

IMPORTANT — This Is Not Zero-Latency

The manual lists latency as 70–120ms at 1080p@60Hz.

Latency may vary depending on:

1. Resolution
2. Transmission distance
3. Number of connected Receivers
4. Wireless interference
5. Installation environment 
    
   This is suitable for presentations, video viewing, education, and general wireless display use. 
    
   It is not ideal for fast gaming, live performance monitoring, or applications that require instant response.

IMPORTANT — HDMI Loop Out Is on the Transmitter

The Transmitter includes an HDMI OUT port.

This HDMI OUT port can be used to connect a local display near the HDMI source.

Example setup:

This is useful when the same HDMI source needs to be viewed locally and wirelessly sent to another display.

IMPORTANT — IR Passback Is Supported

The WHD-165-K supports IR passback.

This allows the user near the Receiver/display side to control the HDMI source device located near the Transmitter.

Typical setup:

1. Connect the IR Blaster cable to IR OUT on the Transmitter
2. Place the IR Blaster near the source device’s IR window
3. Connect the IR Receiver cable to IR IN on the Receiver
4. Place the IR Receiver where the remote control can see it 
    
   The supported IR frequency is 20kHz to 60kHz. 
    
   The listed IR receiving range is up to 5m.

IMPORTANT — Uses 5GHz Wireless Frequency Bands

The WHD-165-K uses 5.18–5.24GHz wireless frequency bands.

The manual lists four channels:

Channel switching can help reduce interference when multiple wireless devices or multiple WHD-165-K kits are used nearby.

IMPORTANT — SSID Pairing and Channel Switching Are Supported

The WHD-165-K supports SSID pairing and channel switching.

Use SSID pairing when the Transmitter and Receiver need to be manually paired.

Use channel switching when there is wireless interference or when multiple sets are being used in the same area.

The manual recommends switching each paired set to a different channel if multiple WHD-165-K kits are being used nearby.

IMPORTANT — Both Units Need Power

Both the Transmitter and Receiver require power.

The package includes two power adapters.

The power supply specification is DC 5V/1A.

Poor or insufficient power may cause:

1. No video
2. Wireless dropouts
3. Pairing issues
4. Flickering
5. Unstable signal
6. Receiver not connecting

IMPORTANT — Firmware Upgrade Through Micro USB

Both the Transmitter and Receiver include a Micro USB port.

The Micro USB port is used for firmware upgrade.

It is not needed for normal wireless HDMI operation.

Use firmware updates only when provided by OREI support or from the official product support page.

IMPORTANT — Stable 24/7 Operation Is Supported

The manual lists stable 24/7 operation.

This makes the WHD-165-K suitable for longer-running applications such as:

1. Signage
2. Information displays
3. Classrooms
4. Conference rooms
5. Monitoring displays
6. Continuous video display setups 
    
   For best long-term reliability, use the included power adapters and keep the units well ventilated.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the HDMI source device to HDMI IN on the Transmitter. 
   Examples include a Blu-ray player, set-top box, cable box, laptop, desktop PC, media player, or streaming device.
2. Connect a local display to HDMI OUT on the Transmitter if needed.
3. Connect the remote display to HDMI OUT on the Receiver.
4. Connect the included antennas to both the Transmitter and Receiver.
5. Connect the IR Blaster cable to IR OUT on the Transmitter if IR control is needed.
6. Place the IR Blaster near the source device’s IR window.
7. Connect the IR Receiver cable to IR IN on the Receiver.
8. Place the IR Receiver where the remote control can see it.
9. Connect the included power adapters to both units.
10. Power on the source device and displays.
11. Wait for the Wi-Fi indicators to show connection.
12. If the units do not connect, hold the Channel Switch button on both units for 5 seconds to enter SSID pairing mode.
13. If multiple WHD-165-K sets are being used nearby, switch each paired set to a different channel.
14. Test video, audio, local loop out, and IR control.

Power Requirement — Critical

Both units require DC 5V/1A power.

Use the included power adapters for best performance.

Wireless Signal Requirement — Critical

For best performance, keep the Transmitter and Receiver within the listed line-of-sight range.

Wireless performance may be affected by:

1. Walls
2. Cabinets
3. Metal objects
4. AV racks
5. Other wireless devices
6. Wi-Fi congestion
7. Physical obstructions
8. Long distance
9. Poor power supply 
    
   If the signal is unstable, move the units closer together, reduce obstacles, switch channels, or check the antennas.

HDMI Cable Requirement — Critical

Use good-quality HDMI cables for the source, local display, and remote display.

Poor HDMI cables may cause:

1. No video
2. Flickering
3. Black screen
4. Audio dropouts
5. Wrong resolution
6. HDCP handshake issues
7. No signal on loop out 
    
   For best results, test the HDMI source directly with the display before using the wireless extender.

Understanding the Transmitter

The Transmitter is installed near the HDMI source.

It has:

1. HDMI IN for the source
2. HDMI OUT for local display loop out
3. IR OUT for source control
4. Antenna connectors
5. Channel Switch button
6. Wi-Fi indicator
7. Signal indicator
8. Power indicator
9. Power input
10. Micro USB firmware upgrade port 
     
    The Transmitter sends the HDMI signal wirelessly to one or more Receivers.

Understanding the Receiver

The Receiver is installed near the remote display.

It has:

1. HDMI OUT to the display
2. IR IN for the IR Receiver cable
3. Antenna connectors
4. Channel Switch button
5. Wi-Fi indicator
6. Signal indicator
7. Power indicator
8. Power input
9. Micro USB firmware upgrade port 
    
   The Receiver receives the wireless HDMI signal and outputs it to the display.

Understanding One-to-One Connection

In a one-to-one setup, one Transmitter sends the signal to one Receiver.

Example:

This setup provides the longest listed wireless range, up to 50m / 164ft line of sight.

Understanding One-to-Four Connection

The WHD-165-K can support up to one Transmitter with four Receivers.

Example:

In one-to-four mode, the same HDMI source is shown on all connected Receiver displays.

It does not create different video outputs for each display.

Understanding the Wi-Fi Indicator

The Wi-Fi indicator shows wireless connection and pairing status.

Use this indicator when troubleshooting wireless connection issues.

Understanding the Signal Indicator

The Signal indicator shows HDMI signal status.

If the Wi-Fi connection is successful but there is no video, check the Signal indicator and confirm the source device is outputting HDMI.

Understanding the Channel Switch Button

The Channel Switch button has three functions.

Use channel switching if the signal is unstable or there is interference from nearby devices.

Understanding SSID Pairing

SSID pairing manually pairs the Transmitter and Receiver.

To pair:

1. Hold the Channel Switch button on the Transmitter for 5 seconds.
2. Hold the Channel Switch button on the Receiver for 5 seconds.
3. Both Wi-Fi indicators should flash quickly in yellow.
4. When pairing is successful, the Wi-Fi indicators change from quick flashing to slow flashing or steady.

Use SSID pairing if the units are not connecting automatically.

Understanding Channel Frequencies

The WHD-165-K supports four wireless channels.

If multiple kits are installed in the same area, pair each Transmitter and Receiver set first, then switch each set to a different channel to reduce interference.

Understanding IR Passback

IR passback allows remote control signals to travel from the Receiver side back to the Transmitter side.

Typical setup:

This allows the user near the remote display to control the HDMI source device.

Supported Video and Audio

The WHD-165-K supports video formats including:

Supported audio:

The manual does not list Dolby, DTS, or advanced surround audio support separately. For best compatibility, use PCM / Stereo if audio issues occur.

Supported Technical Specifications

What Source Devices Is the WHD-165-K Compatible With?

The WHD-165-K is compatible with HDMI source devices such as:

1. Blu-ray players
2. Set-top boxes
3. Cable boxes
4. Streaming devices
5. Media players
6. Laptops with HDMI output
7. Desktop PCs with HDMI output
8. Game consoles with supported HDMI output
9. HDMI matrix outputs
10. DVRs
11. NVRs 
     
    The source device must have an HDMI output and support the selected resolution.

What Displays Is the WHD-165-K Compatible With?

The WHD-165-K can connect to HDMI displays such as:

1. 1080p TVs
2. Monitors
3. Projectors
4. Commercial displays
5. Conference room displays
6. Classroom displays
7. Presentation displays
8. Digital signage displays
9. Local loop display near the source 
    
   The display must have an HDMI input and support the selected resolution.

Frequently Asked Questions

Q: What is the OREI WHD-165-K used for? 
A: The WHD-165-K is used to wirelessly extend a 1080p@60Hz HDMI signal from one source to one or more displays. It supports HDMI loop out, IR passback, and up to 1-to-4 wireless transmission.

Q: Does the WHD-165-K support 4K? 
A: No. It supports up to 1080p@60Hz and 1920x1200.

Q: Does the WHD-165-K support 1080p@60Hz? 
A: Yes. It supports 1080p@50/60Hz.

Q: Does the WHD-165-K support 8K? 
A: No. It does not support 8K.

Q: Does the WHD-165-K support 4K@120Hz? 
A: No. It does not support 4K@120Hz.

Q: Is this a wireless HDMI extender? 
A: Yes. It sends HDMI wirelessly between the Transmitter and Receiver.

Q: What HDMI version does it support? 
A: It supports HDMI 1.3.

Q: What HDCP version does it support? 
A: It supports HDCP 1.4.

Q: What is the maximum transfer rate? 
A: The manual lists the maximum transfer rate as 4.96Gbps.

Q: How far can it transmit wirelessly? 
A: In one-to-one mode, it supports up to 50m / 164ft line of sight.

Q: How far does it transmit with multiple Receivers? 
A: The manual lists up to 40m for one-to-two, 35m for one-to-three, and 30m for one-to-four.

Q: Does it work through walls? 
A: The listed distances are line-of-sight. Walls and obstacles can reduce wireless range and stability.

Q: Does it support one Transmitter to multiple Receivers? 
A: Yes. It supports up to 1-to-4 wireless transmission.

Q: Does the Transmitter have HDMI loop out? 
A: Yes. The Transmitter has HDMI OUT for connecting a local display near the source.

Q: What is HDMI loop out used for? 
A: It lets you connect a local display near the source while also sending the signal wirelessly to one or more Receiver displays.

Q: Does it support IR remote control? 
A: Yes. It supports IR passback.

Q: Which IR cable goes on the Transmitter? 
A: The IR Blaster cable connects to IR OUT on the Transmitter and should be placed near the source device’s IR window.

Q: Which IR cable goes on the Receiver? 
A: The IR Receiver cable connects to IR IN on the Receiver and should be placed where the remote control can point at it.

Q: What IR frequency is supported? 
A: The manual lists 20kHz to 60kHz.

Q: What is the IR receiving range? 
A: The manual lists up to 5m.

Q: Does it need power? 
A: Yes. Both the Transmitter and Receiver need power using the included DC 5V/1A power adapters.

Q: Does it require drivers? 
A: No driver installation is listed. It works as a wireless HDMI extender.

Q: Does it support firmware upgrade? 
A: Yes. Firmware upgrade is supported through the Micro USB port.

Q: Does it support 24/7 operation? 
A: Yes. The manual lists stable 24/7 operation.

Q: What wireless frequency does it use? 
A: It uses 5.18GHz to 5.24GHz wireless frequency bands.

Q: How many channels are available? 
A: Four channels are listed: 5.180GHz, 5.200GHz, 5.220GHz, and 5.240GHz.

Q: What is SSID pairing? 
A: SSID pairing manually pairs the Transmitter and Receiver so they connect to each other.

Q: How do I enter SSID pairing mode? 
A: Hold the Channel Switch button on both the Transmitter and Receiver for 5 seconds. The Wi-Fi indicators will flash quickly in yellow.

Q: How do I restore factory settings? 
A: Press and hold the Channel Switch button for 10 seconds.

Q: What does slow flashing Wi-Fi indicator mean? 
A: It means the unit is waiting for connection.

Q: What does steady Wi-Fi indicator mean? 
A: It means the wireless connection is successful.

Q: What does quick flashing Wi-Fi indicator mean? 
A: It means the unit is in SSID pairing mode.

Q: What does the Signal indicator mean? 
A: Light off means no HDMI signal, steady means HDMI signal is transmitting normally, and quick flash means restore factory settings.

Q: What should I do if there is no video? 
A: Check that both units have power, confirm the source is connected to Transmitter HDMI IN, confirm the Receiver HDMI OUT is connected to the display, select the correct display input, and check the Signal indicator.

Q: What should I do if the wireless connection fails? 
A: Move the units closer together, reduce obstacles, confirm antennas are installed, hold both Channel Switch buttons for 5 seconds to pair again, and try a different wireless channel.

Q: What should I do if the signal is unstable? 
A: Keep the setup within line of sight, reduce wireless interference, install the antennas securely, and press the Channel Switch button to change channels.

Q: Is it good for gaming? 
A: It is not ideal for fast gaming because the manual lists 70–120ms latency at 1080p@60Hz. It is better for presentations, video conferences, education, signage, and general video viewing.

Q: Does the WHD-165-K need external power? 
A: Yes. Connect the included DC 5V/1A power adapter to both the Transmitter and Receiver.