1. Introduction
The Vention AC650 USB Wi-Fi Adapter is designed to provide high-speed wireless connectivity for your desktop, laptop, or notebook computer. Featuring dual-band support (2.4GHz and 5GHz) and a 6dBi high-gain adjustable antenna, it ensures a stable and wide-ranging Wi-Fi signal. This adapter also supports Bluetooth 5 for connecting multiple devices simultaneously (on compatible models). This manual provides detailed instructions for installation, operation, and troubleshooting to help you get the most out of your device.
2. Product Features
- Enhanced Wi-Fi Experience: Provides a more powerful and stable wireless connection.
- Longer Distance & Wider Range: Equipped with a 6dBi high-gain antenna for superior signal transmission and penetration compared to built-in network interface cards (NICs).
- Angle Adjustable Antenna: The multi-directional antenna can be rotated and adjusted for optimal signal reception, even in narrow spaces.
- Dual-Band Connectivity: Supports both 2.4GHz (up to 200Mbps) for strong penetration and long transmission distance, and 5GHz (up to 433Mbps) for large bandwidth, less interference, and low latency, suitable for 500M broadband.
- Wi-Fi Receiving & Transmission: Enables your desktop or laptop to connect to Wi-Fi networks and can also transmit Wi-Fi signals to other devices (Windows 10/11 built-in feature; other Windows versions may require third-party software).
- Smooth, Lag-Free Connections: Utilizes Wi-Fi 5 (802.11ac) technology for faster and more stable data transfer rates.
- Simultaneous Bluetooth Connections: Supports connecting up to 7 Bluetooth devices simultaneously with stable and smooth signals (on models with Bluetooth functionality).
- Robust Security: Supports encryption and security protocols including WPE, WPA/WPA2, WPA-PSK/WPA2-PSK, and MU-MIMO to secure your personal data against hijacking, information leaks, hacking, and other attacks.
- Realtek Chipset: Features a Realtek chip for improved data processing and wireless performance, ensuring stable and efficient data transmission.
- Windows Compatibility: Supports Windows 7/8/8.1/10/11.
3. Specifications
| Attribute | Detail |
|---|---|
| Brand | Vention |
| Product Name | USB Wi-Fi Adapter |
| Model | KDU/KDT (KDUB0) |
| Color | Black/Grey (Varies by model) |
| Interface Type | USB 2.0 Type-A |
| Material | ABS |
| Wireless Standard | IEEE 802.11a/b/g/n/ac (Wi-Fi 5) |
| Wireless Communication Standard | 802.11.ac |
| Encryption & Security Protocols | WPE, WPA/WPA2, WPA-PSK, WPA2-PSK, MU-MIMO |
| Wireless Frequency | 2.4GHz & 5GHz (Dual-Band) |
| Connection Speeds | 2.4GHz (200Mbps) / 5GHz (433Mbps) |
| Antenna Gain | 6dBi (for models with external antenna) |
| Bluetooth Protocol | Bluetooth 5 (for compatible models) |
| Application | Desktop, Laptop, PC, Notebook |
| Kind | External |
| Heat Dissipation | Support |
| Certification | RoHS |
| Package | Yes (Blister) |
| Warranty | 1 Year |
4. Package Contents
The package contents may vary slightly depending on the specific model (KDU or KDT) and production batch. Please refer to the actual product received.
KDU Model
- Blister * 1 (USB Wi-Fi Adapter)
- Drive CD * 1
- User Manual * 1
KDT Model
- Blister * 1 (USB Wi-Fi Adapter)
- User Manual * 1
5. Setup & Installation
The product may require manual driver installation on some devices or systems. Please ensure correct installation of drivers corresponding to your system and the product model.
Driver Download Link: https://www.vention.cn/support/#Download
A. Install the Wi-Fi Driver
- Insert the Adapter: Insert the USB Wi-Fi Adapter into an available USB port on your computer (laptop or desktop PC).
- Access CD Drive: Open "This PC" or "My Computer" on your desktop.
- Open Driver: Double-click to open the CD drive (if using the included CD) or navigate to the downloaded driver folder.
- Install Wi-Fi Driver: Locate and open the "Wifi AutoInstall Setup" folder, then click "Install". The installation should complete automatically, and the interface will disappear.
- Connect to Wi-Fi: Click on the Wi-Fi icon in the taskbar (usually lower right corner), select your desired Wi-Fi network, and click "Connect" to complete the installation of the wireless network adapter.
B. Install the Bluetooth Driver (Only for Windows 7)
For models with Bluetooth functionality, follow these steps if you are using Windows 7. For newer Windows versions, Bluetooth drivers are often plug-and-play or automatically installed.
- Locate Bluetooth Driver: Ensure the USB Wi-Fi Adapter is plugged into an available USB port. In the downloaded Bluetooth driver folder (or insert the CD-ROM), locate the "Bluetooth" folder and double-click "Setup.exe."
- Follow On-Screen Instructions: Follow the on-screen instructions to install the Bluetooth driver.
- Proceed with Installation: Click "Next" to proceed with the installation.
- Restart Computer: Select "Yes, I want to restart my computer now" and click "Finish" to complete the installation.
6. Operating Instructions
6.1 Wi-Fi Connection
- Ensure the Wi-Fi driver is successfully installed (refer to Section 5.A).
- Click the Wi-Fi icon in your system tray (usually bottom-right corner of the screen).
- A list of available Wi-Fi networks will appear. Select your desired network.
- If prompted, enter the network security key (password) and click "Connect".
- Your computer should now be connected to the Wi-Fi network.
6.2 Wi-Fi Transmission (Hotspot Function)
If your operating system supports it (e.g., Windows 10/11 built-in Mobile Hotspot feature), you can use your computer to transmit Wi-Fi signals to other devices.
- Ensure your computer is connected to the internet via the Vention Wi-Fi adapter.
- Go to your computer's network settings (e.g., Settings > Network & Internet > Mobile hotspot on Windows 10/11).
- Enable the Mobile Hotspot feature and configure the network name (SSID) and password.
- Other devices can now connect to your computer's Wi-Fi hotspot.
6.3 Bluetooth Connection (for compatible models)
- Enable Bluetooth: Ensure Bluetooth is enabled on your computer and the Vention adapter's Bluetooth driver is installed (refer to Section 5.B for Windows 7).
- Access Bluetooth Settings: Click on the Bluetooth icon (typically in the lower right corner of the taskbar) or navigate to your computer's Bluetooth settings.
- Add Device: Right-click the mouse and select "Add Device" or similar option to start searching for Bluetooth devices.
- Prepare Device for Pairing: Ensure your Bluetooth device (e.g., headphones, mouse) is turned on and in pairing mode.
- Initiate Pairing: Once your Bluetooth device is detected, double-click its icon to initiate the pairing process. Follow any on-screen prompts to complete pairing.
7. Maintenance
- Keep the adapter clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the adapter to extreme temperatures, humidity, or direct sunlight.
- Do not attempt to disassemble or repair the adapter yourself, as this will void the warranty.
- Store the adapter in a safe place when not in use to prevent physical damage.
8. Troubleshooting
- Adapter Not Detected:
- Try inserting the adapter into a different USB port.
- Ensure the USB port is functional.
- Restart your computer.
- No Wi-Fi Networks Detected:
- Verify that the Wi-Fi driver is correctly installed (check Device Manager).
- Ensure your computer's Wi-Fi is enabled.
- Check if your router is broadcasting a Wi-Fi signal.
- Slow Connection Speed:
- Ensure you are connected to the 5GHz band if available and your router supports it, for faster speeds and less interference.
- Move closer to your Wi-Fi router to improve signal strength.
- Check for other devices interfering with the Wi-Fi signal.
- Update your Wi-Fi adapter drivers to the latest version from the Vention support website.
- Bluetooth Not Connecting (for compatible models):
- Ensure the Bluetooth driver is installed (especially for Windows 7).
- Make sure the Bluetooth device you are trying to connect is in pairing mode.
- Check your computer's Bluetooth settings to ensure Bluetooth is turned on.
- Remove and re-add the Bluetooth device.
- Driver Installation Issues:
- Download the latest drivers from the official Vention support website.
- Temporarily disable antivirus software during driver installation if it interferes.
- Ensure you have administrator privileges to install drivers.
9. User Tips
- Optimal Placement: For desktop PCs, consider using a rear USB port for the adapter, as front USB ports on some desktop computers may offer less effectiveness or be unavailable.
- Driver Updates: Regularly check the Vention support website for updated drivers to ensure optimal performance and compatibility with the latest operating system versions.
- Antenna Adjustment: Experiment with the adjustable antenna's angle to find the best signal reception for your specific environment.
- Dual-Band Advantage: Utilize the 5GHz band for activities requiring high bandwidth and low latency, such as online gaming or streaming, and the 2.4GHz band for broader coverage and better penetration through walls.
10. Warranty & Support
The Vention AC650 USB Wi-Fi Adapter comes with a 1-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support, driver downloads, or further assistance, please visit the official Vention support website:
https://www.vention.cn/support/#Download
Please note that the warranty does not cover damage caused by misuse, accidents, unauthorized modifications, or natural disasters.





