Wireless HDMI dongle OPTOMA W3P00000021 (WHD221 EZ Cast Mate) – HDMI/USB-C connectivity

OPTOMA WHD221 EZ Cast Mate is a wireless HDMI dongle that enables screen mirroring and wireless presentations on HDMI-equipped displays. The compact adapter plugs into an HDMI port and supports connection from compatible USB-C source devices, allowing video, slides and web content to be shared without physical cables. Designed for meeting rooms, classrooms and home environments, the device simplifies switching between presenters and reduces setup time for ad-hoc collaboration.

Advantages

The dongle provides cable-free transmission of audio and video while maintaining simple plug-and-play operation on supported displays. Its USB-C compatibility allows connection from modern laptops, tablets and smartphones where the source device supports video output over USB-C. The compact form factor keeps the adapter discreet on the display, and built-in wireless streaming features enable multiple users to mirror their screens and present content with minimal configuration.

Suitable for

• Meeting rooms and conference presentations
• Classrooms and lecture halls for teacher and student content sharing
• Home entertainment for streaming video and screen mirroring
• Temporary setups where quick device switching is required

Key specifications

• Wireless screen mirroring and presentation capability
• HDMI output for connection to displays and projectors
• Support for USB-C video source devices where compatible
• Compact dongle form factor for discreet installation
• Designed for multi-user collaboration and quick switching between presenters

How to use

Insert the dongle into an available HDMI port on the display and provide power if required by the display’s USB port or an external power source. Select the corresponding HDMI input on the display and follow on-screen prompts or the device’s quick-start instructions to connect a source device. For USB-C compatible sources, ensure the source device supports video output over USB-C and enable the appropriate display/output setting on the device. Use the device’s interface to manage connections and switch between presenting devices as needed.

Recommendations

To ensure stable wireless performance, place the dongle in a location with clear line-of-sight to the presenting devices when possible, avoid excessive Wi‑Fi interference, and keep device firmware and source drivers up to date. For best results with USB-C sources, confirm that the source supports video output over USB-C and that any required adapter settings on the source device are enabled.