Traditional meeting rooms were built around fixed projectors, fabric screens, and long HDMI cables running across tables and floors, which often leads to time spent plugging and unplugging cables, switching inputs, and dealing with worn connectors. As laptops, tablets, and hybrid work become more common, these setups feel increasingly slow and restrictive. Wireless screen mirroring offers a simple way to modernize such rooms without replacing existing projectors or displays by changing how video signals are delivered rather than the room hardware. This guide explains how an older meeting room can be upgraded into a flexible wireless display setup using the P20 wireless HDMI transmitter and receiver as a practical reference.
1. Compatibility Between Older Projectors and Modern Devices
Many offices, schools, and training centers still rely on projectors installed years ago. These displays typically support HDMI 1.4 input, Full HD resolution, and basic audio output. What they lack are built-in wireless features or modern smart systems. In most cases, the projector itself still works well, but connecting newer devices becomes the main obstacle.
Today’s laptops, desktops, media players, and game consoles do not all behave the same way when outputting video. Some provide a full-size HDMI port, while others depend on USB-C video output using DisplayPort Alt Mode. In a traditional room, this often leads to repeated cable changes, searching for adapters, and testing connections before a meeting can even begin.
A wireless HDMI system simplifies this process by separating the display connection from the presenter’s device. The receiver stays connected to the projector at all times. The transmitter plugs into the source device only when needed. Once connected, the video signal is sent wirelessly, without requiring the projector to support Miracast, AirPlay, or any smart protocol.
As long as the projector has an HDMI input and supports 1080p output, it remains usable. This allows older displays from brands such as Acer or BenQ to continue serving modern meeting needs without additional troubleshooting at the start of every session.
2. Wireless Upgrade Workflow from Fixed Cables to Flexible Sharing
Converting a meeting room to wireless operation does not require construction work or permanent changes. The entire setup can be completed quickly and repeated across multiple rooms using the same process.
2.1 Connecting the Receiver to the Display
The wireless HDMI receiver is installed directly at the projector, TV, or conference display. It connects to the HDMI input and remains in place for daily use. Power is supplied through a USB connection rated at 5V and 2A. For long meetings or fixed rooms, a dedicated power adapter is recommended to avoid interruptions caused by unstable USB power.
Once installed, the receiver becomes the permanent wireless input source for the display.
2.2 Preparing the Transmitter for Source Devices
The transmitter connects to the HDMI output of a laptop, desktop computer, set-top box, or camera. Because HDMI ports do not provide enough power to run the transmitter, USB power is required. This can come from a laptop USB port, a display USB port, or a wall adapter.
In practice, this means the presenter only needs to plug in the transmitter and power cable, rather than crawling behind a projector or display.
2.3 Automatic Connection and Display Output
Wireless HDMI kits are pre-paired at the factory. After both transmitter and receiver are powered, they automatically establish a direct wireless link. Within seconds, the display shows the source image without any software installation or network setup.
This automatic process removes common delays caused by driver installation, login permissions, or incompatible screen-sharing software.
2.4 Supporting Multiple Presenters
The P20 wireless HDMI system supports up to eight transmitters paired with a single receiver. In practical meeting use, this allows multiple presenters to prepare their own HDMI transmitters in advance and connect them to different laptops or media devices.
Only one transmitter displays on the screen at a time. When switching presenters, the system changes the active transmitter rather than showing multiple sources simultaneously. This design keeps the display output stable and avoids bandwidth conflicts that can occur with multi-stream systems.
In real meeting rooms, this means presenters no longer need to unplug and reconnect HDMI cables at the projector. Each user connects their own transmitter at their seat, and the display switches between sources as needed. This workflow is especially useful in team meetings, training sessions, and shared conference rooms where multiple devices take turns presenting.
3. Practical Usage Considerations for Daily Stability
Although wireless HDMI systems are easy to deploy, a few operational details make a noticeable difference in day-to-day reliability.
3.1 Power Supply Consistency
Stable power is critical. Both transmitter and receiver require 5V/2A input. When power is insufficient, users may see black screens, brief signal drops, or delayed connections. For permanent installations, using a wall adapter instead of a low-output USB port helps maintain stable operation throughout long meetings.
3.2 Wireless Conditions in Real Rooms
The P20 operates on the 5GHz band using 802.11ac technology. This allows smooth 1080p video at 60Hz with typical latency between 50 and 80 milliseconds. In open rooms or spaces with light partitions such as glass or wood, performance remains consistent.
In areas with heavy wireless traffic or thick concrete walls, signal range may decrease. Positioning the transmitter and receiver with a clear path improves stability and reduces interference.
3.3 Display Resolution Alignment
For best results, the source device should output 1920×1080 at 60Hz. The projector or display should also be set to a 16:9 aspect ratio. When resolutions do not match, the image may appear stretched, cropped, or scaled incorrectly.
3.4 Data Security and Privacy
Wireless HDMI transmission uses encrypted point-to-point communication. The signal does not appear on public Wi-Fi networks and cannot be discovered by nearby devices. This makes the setup suitable for internal meetings, training sessions, and confidential presentations.
3.5 Audio Output Checks
Video and audio are transmitted together through HDMI. If no sound is heard, the most common cause is the computer still using its internal speakers. Switching the audio output to HDMI in the operating system usually resolves the issue immediately.
4. Expanded Use Scenarios After Wireless Upgrade
Once a meeting room is upgraded, its function goes beyond basic slide sharing.
4.1 Enterprise Meeting Rooms
For IT teams, wireless HDMI reduces cable wear, setup time, and support requests. A fixed receiver combined with multiple transmitters allows fast presenter switching and consistent behavior across rooms.
4.2 Small Businesses and Startups
Smaller teams gain modern functionality without replacing projectors or investing in interactive displays. Meetings start faster, and shared spaces remain clean and flexible.
4.3 Education and Training Environments
Teachers and trainers can move freely while presenting. Laptops, document cameras, and media players can be connected without walking back to the display to change cables.
4.4 Creative and Design Reviews
Design teams benefit from a clean workspace and reliable Full HD output on large screens. Since no drivers are required, compatibility issues during client reviews are minimized.
4.5 Temporary and Shared Spaces
Rental rooms, pop-up offices, and training centers often use older displays. A portable wireless HDMI kit allows these spaces to be upgraded instantly without modifying the venue.
