1. Introduction
This manual provides comprehensive instructions for the usangreen AX88772B Micro USB to RJ45 LAN Adapter. This device allows you to connect your compatible Micro USB-enabled devices, such as laptops, tablets, or TV boxes, to a wired Ethernet network, providing stable and reliable internet connectivity at speeds of 10Mbps or 100Mbps.
Key features of the adapter include:
- Micro USB 2.0 interface for high-speed data transfer.
- Supports 10Mbps and 100Mbps Ethernet speeds.
- Equipped with the genuine ASIX AX88772B chip for reliable performance.
- Compatible with Linux, Windows 7, Windows XP, and Mac OS X operating systems.
- Compact design for portability.

Figure 1.1: The usangreen Micro USB to RJ45 LAN Adapter, showcasing its compact design and Micro USB connector.

Figure 1.2: The adapter shown held in hand, illustrating its small and portable size.
2. Setup Guide
2.1 Package Contents
Before proceeding, ensure all components are present:
- usangreen AX88772B Micro USB to RJ45 LAN Adapter
- User Manual (this document)

Figure 2.1: Front view of the product packaging.
2.2 Connecting the Adapter
- Locate the Micro USB port on your device (e.g., laptop, tablet, TV box).
- Insert the Micro USB connector of the adapter firmly into your device's Micro USB port.
- Connect a standard RJ45 Ethernet cable from your router or modem to the RJ45 port on the adapter.

Figure 2.2: A close-up view of the adapter, highlighting the Micro USB connector and the RJ45 Ethernet port.

Figure 2.3: Illustration of various USB connector types. Ensure you are using the Micro USB variant for this adapter.
2.3 Driver Installation and Compatibility
The usangreen AX88772B adapter is designed for plug-and-play functionality with most modern operating systems. It is compatible with:
- Windows 7, Windows XP, Windows 11 (and likely other Windows versions)
- Mac OS X
- Linux
- Supported Android devices (requires an "Ethernet" option under "Settings >> WIRELESS & NETWORKS"). Note: Not supported with iOS (iPhone/iPad) devices.
For Windows 11, the device is typically plug-and-play, with appropriate drivers automatically installed by the operating system or via Windows Update. For other operating systems, drivers may be automatically detected and installed upon connection.

Figure 2.4: Example of Android device settings, showing where to find the "Ethernet" option to confirm compatibility.

Figure 2.5: The internal AX88772B chip and a Windows network status window confirming the adapter's recognition and driver status.
3. Operating Instructions
Once the adapter is connected and drivers are installed (if necessary), your device should automatically detect the wired network connection. You can verify the connection status through your operating system's network settings.
3.1 Network Speed
The adapter supports Ethernet speeds of 10Mbps or 100Mbps. The actual speed will depend on your network infrastructure (router, modem, Ethernet cable) and internet service provider's speed.
3.2 Usage Scenarios
- Laptops/Tablets: Provides a stable wired connection for devices lacking a built-in Ethernet port, ideal for online gaming, streaming, or large file transfers.
- TV Boxes/Monitors: Enhances network stability for smart TVs or media players that benefit from a wired connection.
- Embedded Systems: Suitable for industrial controllers, network sensors, and Single Board Computers (SBC) requiring reliable Ethernet connectivity.
4. Maintenance
To ensure the longevity and optimal performance of your usangreen AX88772B adapter, follow these general maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the adapter. Avoid using liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Handling: Always grasp the plug when connecting or disconnecting the adapter from your device or the Ethernet cable. Avoid pulling on the cable itself, as this can damage internal wiring.
- Environmental Conditions: Do not expose the adapter to water, excessive humidity, or dusty environments.
5. Troubleshooting
If you encounter issues with your usangreen AX88772B adapter, refer to the following common problems and solutions:
5.1 No Network Connection
- Check Connections: Ensure both the Micro USB connector and the RJ45 Ethernet cable are securely plugged into the adapter and your device/router.
- Verify Cable: Test with a different Ethernet cable to rule out a faulty cable.
- Restart Devices: Restart your computer/device and your router/modem.
- Driver Check: For Windows, go to Device Manager and check if the network adapter is listed and has no error symbols. If needed, try updating the driver or reinstalling it.
- Operating System Compatibility: Confirm your device's operating system is supported (e.g., not iOS). For Android, ensure the "Ethernet" option is available and enabled in network settings.
5.2 Slow or Unstable Connection
- Check Network Speed: Ensure your router and internet plan support the desired speed (10/100Mbps).
- Cable Quality: Use a high-quality Ethernet cable.
- Interference: Keep the adapter away from strong electromagnetic interference sources.
- Device Performance: Ensure your device's hardware and software are not bottlenecking the network speed.
5.3 Adapter Not Recognized
- Try Another USB Port: If available, connect the adapter to a different Micro USB port on your device.
- Test on Another Device: If possible, test the adapter on another compatible device to determine if the issue is with the adapter or your original device.
- Power Cycle: Disconnect the adapter, restart your device, and then reconnect the adapter.
Note: Some users have reported issues with compatibility with specific devices like the Nintendo Wii U. This adapter is not officially supported for gaming consoles unless explicitly stated by the console manufacturer.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | AX88772B |
| Brand | usangreen |
| Connector Type | Micro USB 2.0 to RJ45 |
| Ethernet Speed | 10Mbps / 100Mbps (N-way protocol) |
| Chipset | ASIX AX88772B |
| Compatible OS | Linux, Windows 7/XP/11, Mac OS X, select Android devices |
| Dimensions (Package) | 5 x 4.21 x 0.71 inches |
| Item Weight | 0.704 ounces |
| Cable Length | Approximately 22cm |
7. Warranty and Support
7.1 Product Support
For technical assistance or inquiries regarding your usangreen AX88772B Micro USB to RJ45 LAN Adapter, please refer to the official usangreen brand store or contact their customer service through the platform where the product was purchased.
Visit the official usangreen store for more information and products: usangreen Store
7.2 Warranty Information
Specific warranty details may vary by region and retailer. Please retain your proof of purchase for any warranty claims. Generally, products are covered by a standard return policy, which for this product is 30 days for refund/replacement as per Amazon's policy.