Introduction
The Comfast CF-WU785AC is a high-performance dual-band wireless network adapter designed to provide fast and reliable Wi-Fi connectivity for desktop computers and laptops. Featuring a 1300Mbps high-speed rate and four high-gain 6dBi antennas, it enhances signal coverage and depth. This adapter supports USB 3.0 for faster data transmission and offers driver-free installation for most Windows operating systems, making it convenient for users.
Features
- High-Speed Wireless Connectivity: Up to 1300Mbps (867Mbps on 5GHz, 400Mbps on 2.4GHz) for smooth video streaming, gaming, and large data transfers.
- Dual-Band Support: Operates on both 2.4GHz and 5GHz frequencies for flexible and less congested network access.
- Powerful Antennas: Equipped with four 6dBi high-gain omnidirectional antennas to significantly increase signal coverage and penetration.
- USB 3.0 Interface: Ensures faster data transmission speeds compared to USB 2.0, with a transmission bandwidth of up to 5.0Gbps.
- Driver-Free Installation: Plug-and-play functionality for Windows 7/8/8.1/10/11 (32-bit and 64-bit) systems.
- Linux Monitor Mode Support: Compatible with Kali Linux for advanced network monitoring.
- Extended USB Cable: Includes a standard 1.2-meter USB extension cable for flexible placement and optimal signal reception.
Package Contents
Please check the package for the following items:
- 1 x Comfast CF-WU785AC Wireless Adapter
- 4 x 6dBi Antennas (integrated)
- 1 x USB 3.0 Extension Cable (1.2m)
- 1 x English User Manual
- 1 x Guarantee Card

Setup and Installation
For Windows 7/8/8.1/10/11 (32-bit & 64-bit):
- Connect the Adapter: Insert the Comfast CF-WU785AC wireless adapter into an available USB 3.0 port on your computer. For optimal performance, use a USB 3.0 port (usually blue).
- Automatic Driver Installation: For most Windows operating systems (Windows 7/8/8.1/10/11), the system will automatically detect the device and install the necessary drivers. This is a plug-and-play process, and no external CD or manual driver download is typically required.
- Verify Connection: Once the driver is installed, the adapter will function as a Wi-Fi receiver. You should see available Wi-Fi networks in your system's network settings.

For Windows XP, Mac, and Linux Systems:
For these operating systems, you may need to manually download and install the driver package. Please refer to the official Comfast website for the latest drivers and installation instructions.
Driver Download Link: http://www.comfast.com.cn/index.php?m=content&c=index&a=show&catid=30&id=471

Operating Instructions
- Connect to a Network: After successful driver installation, open your computer's network settings.
- Select Wi-Fi Network: Choose your desired Wi-Fi network from the list of available networks.
- Enter Password: If prompted, enter the Wi-Fi password (security key) for the selected network.
- Establish Connection: Your computer should now connect to the Wi-Fi network.
- Optimal Placement: Utilize the 1.2-meter USB extension cable to position the adapter for the best possible signal reception. Placing it in an open area, away from obstructions, can improve performance.



Video: Product demonstration highlighting features like strong signal, fast speed, and easy installation.
Specifications
| Attribute | Value |
|---|---|
| Model | CF-WU785AC |
| Frequency | 2.412~2.484GHz; 5.180~5.825GHz (Dual-Band) |
| Working Standard | IEEE802.11a/b/g/n/ac |
| Wireless Transmission Rate | 11n: 400Mbps; 11ac: 867Mbps (Total 1300Mbps) |
| Interface Type | Micro USB 3.0 (Compatible with USB 2.0) |
| Antenna | 4 dual-band 6dBi Antennas |
| Safety Features | WPA-PSK/WPA2-PSK, WPA/WPA2, WEP |
| Transmit Power | 18dBm |
| System Supports | Windows 7/8/8.1/10 (32bit, 64bit); Windows XP, Mac, Linux (manual driver install for XP/Mac/Linux) |
| Chipset | MT7612UN |
| Size | 101*98*175mm |
| Working Temperature | 0°C~40°C |
| Storage Temperature | -40°C~70°C |
| Working Humidity | 10%~90%RH Non-condensing |
| Storage Humidity | 5%~90%RH Non-condensing |

Troubleshooting
- Q: My PC doesn't have a CD drive. How do I install the driver?
- A: If your PC lacks a CD drive, you can download the necessary drivers from the official Comfast website. The driver for CF-WU785AC is available at http://www.comfast.com.cn/index.php?m=content&c=index&a=show&catid=30&id=471.
- Q: Does the Wi-Fi adapter support Linux or Mac systems?
- A: The CF-WU785AC supports Kali Linux. However, it does not support macOS. For Linux, manual driver installation is required.
- Q: Does the Wi-Fi adapter support monitor mode and packet injection?
- A: Yes, the CF-WU785AC supports monitor mode and packet injection when used with Kali Linux.
- Q: Does the Wi-Fi adapter support AP function (hotspot)?
- A: The CF-WU785AC is designed to receive Wi-Fi signals only and does not support AP (hotspot) functionality.
- Q: Is the Wi-Fi adapter compatible with Windows 10 and 11?
- A: Yes, it fully supports Windows 10 and 11, as well as Windows XP/7/8/8.1 (both 32-bit and 64-bit versions).
- Q: Can this Wi-Fi adapter be used with a TV?
- A: No, this Wi-Fi adapter is not designed for use with TVs.
- Q: What chipset does this Wi-Fi adapter use?
- A: The CF-WU785AC uses the MT7612UN chipset.
User Tips
- Driver Installation: For Windows users, the adapter is generally plug-and-play. If automatic installation fails or for Linux/Mac users, ensure you download the correct driver from the official Comfast website.
- Signal Strength: Utilize the included 1.2m USB extension cable to position the adapter in an optimal location, such as on top of your desk or away from large metal objects, to maximize signal reception and speed.
- USB 3.0 Port: Always connect the adapter to a USB 3.0 port on your computer for the best performance and fastest transmission speeds.
- Dual-Band Advantage: If your router supports both 2.4GHz and 5GHz, try connecting to the 5GHz band for higher speeds and less interference, especially for activities like online gaming or 4K video streaming. Use 2.4GHz for wider coverage and better penetration through walls.
Maintenance
- Keep Clean: Regularly clean the adapter and its antennas with a soft, dry cloth to prevent dust buildup, which can affect performance.
- Avoid Obstructions: Ensure the adapter is not covered or placed in an enclosed space that could hinder airflow or signal transmission.
- Firm Connection: Periodically check that the USB connection is secure to prevent intermittent connectivity issues.
- Software Updates: Check the Comfast official website periodically for updated drivers, which may offer improved performance or compatibility.
Warranty and Support
For warranty information, technical support, or further assistance, please refer to the guarantee card included in your package or visit the official Comfast website. You can also contact Comfast customer service directly through their website for specific inquiries.





