WHD-66M-K Overview and Use Cases

What Is the WHD-66M-K?

The OREI WHD-66M-K is a 1080P Full HD wireless HDMI extender kit that sends an HDMI signal from a source to a display without a cable between them. It includes one Transmitter and one Receiver. The Transmitter connects to your source, the Receiver connects to your display, and the video and audio travel wirelessly between them over a 5G wireless frequency band, at distances up to 20 meters in line of sight.

It is useful when running an HDMI cable between the source and the display is difficult or impractical, such as a ceiling-mounted projector, a wall-mounted TV across the room, or a laptop that needs to send video to a display in a meeting space. Instead of routing a long cable, you place the Transmitter at the source and the Receiver at the display.

The WHD-66M-K uses ipcolor STREAM technology for high definition, low-latency transmission, with latency in the range of 80 to 170ms. It supports resolutions up to 1920x1200@60Hz and 1920x1080@60Hz, and is backward compatible with lower resolutions. The 5G band provides strong anti-interference performance, and the kit supports SSID pairing and channel switching so multiple sets can run in the same area without interfering with each other. It is a portable, plug-and-play design that supports stable 24/7 operation.

IMPORTANT — WHD-66M-K Is a One-to-One Wireless Link

The WHD-66M-K supports one-to-one wireless transmission, so one Transmitter sends to one Receiver.

It is designed for customers who want to:

• Send one HDMI source to one display without a physical cable between them
• Avoid complicated cable routing for projectors, wall-mounted TVs, or meeting room displays

Each kit is a single Transmitter and Receiver pair. If you have multiple sets in the same area, use SSID pairing and channel switching so they do not interfere with one another.

IMPORTANT — Maximum Range Is 20 Meters in Line of Sight

The WHD-66M-K transmits wirelessly up to 20 meters.

This range is rated for line of sight, meaning a clear path between the Transmitter and Receiver. Walls, large objects, and other obstructions can reduce the effective range and may affect signal quality. For best performance, keep a clear line of sight between the two units.

IMPORTANT — Each Unit Needs Its Own USB Power

Both the Transmitter and the Receiver are powered separately through a Micro-USB port.

Each unit requires a 5V/1A Micro USB power supply. The kit includes two Micro-USB cables, one for each unit. The same Micro-USB port is also used for firmware upgrades.

Controls and Indicators

The Transmitter and Receiver share the same layout of controls and indicators. The main difference is the HDMI connection: on the Transmitter it connects to the source, and on the Receiver it connects to the display.

Transmitter:

Receiver:

Step-by-Step Setup

• Connect the Transmitter to the HDMI output port of your source device, such as a laptop, media player, or set-top box.
• Connect the Receiver to the HDMI input port of your display device, such as a TV, monitor, or projector.
• Connect a Micro-USB cable to the Transmitter and to a 5V/1A USB power source. Do the same for the Receiver using the second included cable.
• Power on both units. The Power Indicator on each unit turns red when powered.
• Wait for the units to connect. The WiFi indicator slow flashes while waiting for a connection, then turns steady on once the connection succeeds.
• Turn on your source and display. When an HDMI signal is being sent, the Signal Indicator turns steady on.
• Confirm the video and audio are appearing on the display.

Understanding SSID Pairing and Channels

If you run more than one WHD-66M-K set in the same area, SSID pairing and channel switching let each Transmitter and Receiver pair stay linked without interfering with the others.

To pair a Transmitter and Receiver:

• Press and hold the Channel Switch button on both the Transmitter and the Receiver for 5 seconds to enter SSID pairing mode. Both WiFi indicators flash quickly.
• When pairing succeeds, the WiFi indicators change from quick flashing to slow flashing or steady on.

The WHD-66M-K operates on the 5G band and offers four channels you can switch between using the Channel Switch button:

To restore a unit to factory settings, press and hold its Channel Switch button for 10 seconds. The Signal Indicator quick flashes while the unit resets.

What Source Devices Is the WHD-66M-K Compatible With?

The WHD-66M-K Transmitter connects to the HDMI output of your source device.

It can be used with:

• Laptops and computers with an HDMI output
• Media players, streaming devices, and set-top boxes
• Other devices with a standard HDMI output

It supports resolutions up to 1920x1200@60Hz and 1920x1080@60Hz, and is backward compatible with 1080P@50/60Hz and 720P@50/60Hz. The Transmitter is HDMI 1.3 and HDCP 1.4 compliant.

What Displays Is the WHD-66M-K Compatible With?

The WHD-66M-K Receiver connects to the HDMI input of your display device.

It can be used with:

• TVs with an HDMI input
• Monitors with an HDMI input
• Projectors with an HDMI input

The display should support the resolution being sent by the source, up to 1080P@60Hz. For the best experience, keep a clear line of sight between the Transmitter and Receiver, within the 20 meter range.

Frequently Asked Questions

Q: What is the OREI WHD-66M-K used for?
A: The WHD-66M-K is used to send a 1080P HDMI signal wirelessly from a source to a display, up to 20 meters in line of sight. It is suited to video conferences, home entertainment, and education settings where running an HDMI cable is impractical.

Q: How far can the WHD-66M-K transmit?
A: It transmits wirelessly up to 20 meters in line of sight. Walls and other obstructions can reduce the effective range, so a clear path between the Transmitter and Receiver gives the best results.

Q: What resolutions does it support?
A: It supports up to 1920x1200@60Hz and 1920x1080@60Hz, and is backward compatible with 1080P@50/60Hz and 720P@50/60Hz.

Q: Can I use more than one set in the same room?
A: Yes. The WHD-66M-K supports SSID pairing and channel switching, so multiple sets can operate in the same area without interfering with each other. It offers four channels on the 5G band.

Q: How do I pair the Transmitter and Receiver?
A: Press and hold the Channel Switch button on both units for 5 seconds to enter SSID pairing mode. The WiFi indicators flash quickly during pairing, then change to slow flashing or steady on once pairing succeeds.

Q: How is the WHD-66M-K powered?
A: Each unit is powered separately through its Micro-USB port using a 5V/1A USB power supply. The kit includes two Micro-USB cables, one for the Transmitter and one for the Receiver.

Q: Is there much lag or delay?
A: The WHD-66M-K uses ipcolor STREAM technology for low-latency transmission, with latency in the range of 80 to 170ms.

Q: How do I know the connection is working?
A: The WiFi indicator slow flashes while waiting for a connection and turns steady on once connected. The Signal Indicator turns steady on when an HDMI signal is being transmitted.

Q: How do I reset the device to factory settings?
A: Press and hold the Channel Switch button on the unit for 10 seconds. The Signal Indicator quick flashes while the unit restores its factory settings.

Q: Can it run continuously?
A: Yes. The WHD-66M-K is designed to support stable 24/7 operation.