1. Introduction
The Fenvi FV-AX900Pro is a high-performance PCIE wireless adapter designed to bring WiFi 6 (802.11AX) and Bluetooth 5.4 connectivity to your desktop computer. This dual-band adapter supports 2.4GHz and 5GHz frequencies, offering fast and reliable wireless networking and seamless connection with a wide range of Bluetooth devices. This manual provides detailed instructions for installation, operation, and troubleshooting.

2. Package Contents
Please verify that all items are present in your package:
- Fenvi FV-AX900Pro PCIE Wireless Adapter
- Two detachable antennas
- Bluetooth connection cable
- Driver CD (or download instructions)
- Low-profile bracket (if included)
3. Setup and Installation
Before installation, ensure your computer is powered off and unplugged from the wall outlet. It is recommended to wear an anti-static wrist strap to prevent static discharge damage.
3.1 System Requirements
- Operating System: Windows 10 (64-bit) or Windows 11 (64-bit)
- Available PCI-E slot (x1, x4, x8, or x16)
- Available F_USB header on motherboard for Bluetooth functionality
3.2 Hardware Installation
- Power Off: Shut down your computer completely and disconnect the power cable.
- Open Case: Open your computer case.
- Locate PCI-E Slot: Find an available PCI-E slot on your motherboard. The FV-AX900Pro is compatible with PCI-E x1, x4, x8, and x16 slots. It is NOT compatible with standard PCI slots.
- Insert Adapter: Carefully insert the FV-AX900Pro adapter into the chosen PCI-E slot until it is firmly seated. Secure it with a screw if your case requires it.
- Connect Bluetooth Cable: Connect one end of the provided Bluetooth cable to the adapter's Bluetooth header and the other end to an available F_USB header on your motherboard. This step is crucial for Bluetooth functionality.
- Attach Antennas: Screw the two detachable antennas onto the connectors on the adapter's bracket. Position them for optimal signal reception.
- Close Case & Power On: Close your computer case, reconnect the power cable, and power on your computer.


3.3 Driver Installation
After hardware installation, you need to install the drivers for the adapter to function correctly.
- Download Drivers: Visit the official Fenvi website to download the latest drivers for the FV-AX900Pro model. The driver download link is: https://www.fenvi.com/drive.html?keyword=FV-AX900+Pro%2BBT5.4.
- Install Drivers: Run the downloaded driver setup file and follow the on-screen instructions to complete the installation.
- Restart Computer: Restart your computer after the driver installation is complete.
4. Operating Instructions
4.1 Connecting to Wi-Fi Networks
- After driver installation and computer restart, the Wi-Fi icon should appear in your system tray.
- Click the Wi-Fi icon to view available networks.
- Select your desired network (2.4GHz or 5GHz band) and click 'Connect'.
- Enter the network password if prompted.
- Once connected, you can enjoy high-speed internet access.

4.2 Connecting Bluetooth Devices
- Ensure the Bluetooth cable is correctly connected to your motherboard's F_USB header.
- Go to Windows Settings > Devices > Bluetooth & other devices.
- Turn on Bluetooth.
- Click 'Add Bluetooth or other device' and select 'Bluetooth'.
- Put your Bluetooth device into pairing mode.
- Select your device from the list and follow any on-screen prompts to complete pairing.

5. Maintenance
- Antenna Placement: Ensure antennas are positioned vertically and away from obstructions for optimal signal strength.
- Driver Updates: Periodically check the Fenvi website for updated drivers to ensure the best performance and compatibility.
- Cleanliness: Keep your computer's interior clean to prevent dust buildup on the adapter, which can affect performance and lifespan.
6. Troubleshooting
6.1 No Wi-Fi or Bluetooth Connectivity
- Check Installation: Ensure the adapter is securely seated in the PCI-E slot and the Bluetooth cable is correctly connected to the motherboard's F_USB header.
- Driver Status: Open Device Manager (right-click Start button > Device Manager) and check if the network adapter and Bluetooth device are listed without any error symbols (yellow exclamation marks). If errors exist, try reinstalling the drivers.
- Antennas: Verify that the antennas are securely attached and properly oriented.
- BIOS Settings: Some motherboards may require enabling the PCI-E slot or USB headers in the BIOS/UEFI settings. Consult your motherboard manual.
6.2 Slow Wi-Fi Speeds
- Router Distance: Ensure your computer is within a reasonable range of your Wi-Fi router.
- Interference: Other electronic devices (microwaves, cordless phones) can cause interference. Try changing your router's Wi-Fi channel.
- Band Selection: Connect to the 5GHz band for higher speeds if your router supports it and your device is close enough. The 2.4GHz band offers better range but lower speeds.
- Driver Update: Ensure you have the latest drivers installed.
6.3 Bluetooth Device Not Pairing
- Bluetooth Cable: Double-check the Bluetooth cable connection to both the adapter and the motherboard.
- Device Pairing Mode: Ensure your Bluetooth device is in discoverable/pairing mode.
- Remove Old Pairings: If you've previously paired the device with another computer, remove that pairing before attempting to connect to the FV-AX900Pro.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | FV-AX900Pro |
| Brand | fenvi |
| Wireless Protocol | 802.11ax (WiFi 6) |
| Wireless Communication Standard | 802.11.ax |
| Frequency Band Class | Dual-Band (2.4G & 5G) |
| Wireless Transmission Rate | Total 900Mbps (2.4GHz: 287Mbps, 5GHz: 600Mbps) |
| Bluetooth Protocol | Bluetooth 5.4 |
| Interface Type | PCI Express |
| Adapter Socket | PCI-E (x1, x4, x8, x16 compatible) |
| Application | Desktop |
| Supported Systems | Windows 10 (64-bit), Windows 11 (64-bit) |
| Heat Dissipation | Support |
| Kind | Internal |
| Dimensions (Card) | Approx. 7cm (2.76 inches) length, 4.5cm (1.77 inches) height |
| Dimensions (Antennas) | Approx. 16cm (6.3 inches) length, 12cm (4.72 inches) height |

8. User Tips
- For optimal Wi-Fi performance, ensure your router also supports WiFi 6 (802.11AX) and is placed in a central location.
- Always keep your drivers updated by regularly checking the Fenvi official website.
- If experiencing intermittent connectivity, try moving your computer or router slightly to reduce potential interference.
- When connecting Bluetooth devices, ensure they are fully charged and within close proximity to the adapter for the initial pairing process.
9. Warranty and Support
For technical support, driver downloads, and warranty information, please visit the official Fenvi website:
https://www.fenvi.com/drive.html?keyword=FV-AX900+Pro%2BBT5.4
Please retain your proof of purchase for any warranty claims.