1. Introduction
The BDFFLY Wireless HDMI Transmitter and Receiver system provides a convenient, cable-free solution for streaming high-definition video and audio. Designed for plug-and-play operation, this system eliminates the need for complex installations, allowing for quick setup within seconds. It supports 1080P/60Hz video and audio transmission with minimal delay, making it suitable for various applications including business meetings, educational presentations, and home entertainment. The system utilizes dual-band 2.4G/5GHz wireless transmission for stable signals over distances up to 328 feet (100 meters).

Image: BDFFLY Wireless HDMI Transmitter and Receiver in action, demonstrating wireless streaming from a laptop to a large screen in an office setting.
2. What's in the Box
Verify that all components are present in the package:
- Wireless HDMI Transmitter x1
- Wireless HDMI Receiver x1
- USB Type-C to HDMI Adapter x1
- USB-A to Type-C Cable x2
- User Manual x1
- Mini HDMI Adapter x1
- Micro HDMI Adapter x1

Image: Detailed view of all items included in the BDFFLY Wireless HDMI Extender package.
3. Setup Guide
The BDFFLY Wireless HDMI system is designed for simple plug-and-play setup. Follow these steps to get started:
- Connect the Receiver (RX): Plug the Receiver unit into an available HDMI input port on your display device (HDTV, monitor, or projector). Connect a USB-A to Type-C cable from the receiver to a 5V/1A power source (e.g., a USB port on your TV or a USB wall adapter).
- Connect the Transmitter (TX): Plug the Transmitter unit into the HDMI output port of your source device (laptop, PC, gaming console, TV box, camera, etc.). Connect a USB-A to Type-C cable from the transmitter to a 5V/1A power source. Use the provided USB Type-C to HDMI, Mini HDMI, or Micro HDMI adapters if your source device requires a different HDMI port type.
- Automatic Connection: Once both units are powered on and connected, they will automatically pair and establish a wireless connection. The display will show the content from your source device.

Image: Visual instructions for connecting the receiver to a TV and the transmitter to a laptop, illustrating the plug-and-play process.
Setup Demonstration Video
Video: A demonstration of the easy setup process for the BDFFLY Wireless HDMI Extender, showing connection to a source and display.
4. Operating Modes
The BDFFLY Wireless HDMI system supports two primary operating modes:
- Mirroring Mode: Duplicates the content from your source device onto the connected display. This is ideal for presentations or sharing content directly.
- Extension Mode: Extends your desktop, allowing you to have different content on your source device and the connected display. This provides a privacy mode and expands your workspace.

Image: Visual representation of the two connection modes: Copy mode (mirroring) and Extended mode.

Image: A business meeting scenario demonstrating the dual modes (Copy and Extended) of the wireless HDMI system.
5. Compatibility
The BDFFLY Wireless HDMI Transmitter and Receiver is compatible with a wide range of devices:
- Source Devices (Transmitter): PC, Laptops, Gaming Consoles (PS3/4/5, Nintendo Switch), Cameras, DV machines, TV boxes, Smartphones (Only compatible with S21/iPhone 15/iPad 10th Generation or above models that support HDMI signal output via their port).
- Display Devices (Receiver): Projectors, Monitors, HDTVs.
Note: For smartphones and tablets, ensure the device's port supports HDMI signal output. A Type-C to HDMI adapter may be required for some mobile devices.

Image: Illustration of HDMI input devices (HDTV, Monitor, Projector) and HDMI output devices (Video camera, DV machine, Set-top box, PS3/4/5, PC computer, Laptop).

Image: Comprehensive diagram showing various compatible transmitter and receiver devices, including specific smartphone models.
6. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 2.42 x 0.81 x 0.47 inches |
| Item Weight | 5 ounces |
| Item Model Number | DT257W-H |
| Brand | BDFFLY |
| Connectivity Technology | Wireless HDMI |
| Special Features | Plug and Play, Wireless HDMI, 328FT/100M Long Range, 2.4G/5G Dual Band, High Stability Signal, Low Latency, Mirroring and Extension Mode, Portable, Lightweight |
| Total HDMI Ports | 2 |
| Audio Output Mode | Stereo |
| Surround Sound Channel Configuration | Stereo |
| Video Encoding | H.264, H.265/HEVC |

Image: Display showing 1080P/60Hz output and the benefits of 2.4G/5GHz dual-band transmission.
7. Troubleshooting
- No Display/Signal:
- Ensure both the transmitter and receiver are properly connected to their respective HDMI ports and are receiving adequate 5V/1A power.
- Check that your display device is set to the correct HDMI input source.
- Verify that the source device (e.g., laptop) is configured to output video to an external display.
- If the units do not sync immediately, press and hold the button on both devices for 5 seconds to re-establish connection.
- Poor Signal Quality/Interference:
- Ensure there are no significant physical obstructions (e.g., thick walls) between the transmitter and receiver.
- Minimize interference from other wireless devices operating on 2.4GHz or 5GHz frequencies.
- Reduce the distance between the transmitter and receiver. The maximum effective range is 328 feet (100 meters) in an open environment, but this can be reduced by obstacles.
- Audio Sync Issues:
- Restart both the transmitter and receiver units.
- Ensure your source device's audio output settings are correctly configured.
Plug and Play Demonstration Video
Video: A short demonstration highlighting the plug-and-play functionality of the BDFFLY Wireless HDMI system.
8. Maintenance
To ensure the longevity and optimal performance of your BDFFLY Wireless HDMI Transmitter and Receiver, follow these maintenance guidelines:
- Keep the devices clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the devices to extreme temperatures, humidity, or direct sunlight.
- Do not attempt to disassemble or repair the units yourself, as this will void the warranty.
- Store the devices in a cool, dry place when not in use.
9. Warranty & Support
BDFFLY provides a 12-month quality replacement service for this product. Your satisfaction is our priority. If you encounter any questions or issues during use, please contact our brand customer service team. We are committed to providing the best solution within 24 hours.