1. Product Overview
The Moshi USB-C to USB 3.1 Adapter allows you to connect standard USB devices, such as external hard drives, USB hubs, or printers, to your MacBook or other devices equipped with a USB-C port. This adapter supports data transfer speeds of up to 5 Gbps and provides up to 3 amps of power output through its reversible USB-C connector. Its anodized aluminum housing is designed to minimize electromagnetic interference, ensuring reliable data transfer performance.

Image 1: Moshi USB-C to USB 3.1 Adapter, a compact device for connecting USB-A peripherals to USB-C ports.
2. Setup Instructions
Setting up your Moshi USB-C to USB 3.1 Adapter is straightforward. No software or drivers are required for basic functionality.
- Identify Ports: Locate the USB-C port on your host device (e.g., MacBook) and the USB-A port on the adapter.
- Connect Adapter to Host Device: Insert the USB-C connector of the Moshi adapter into an available USB-C port on your computer or compatible device. The USB-C connector is reversible, so it can be inserted in either orientation.
- Connect USB Device: Plug your standard USB-A device (e.g., external hard drive, USB flash drive, printer cable, USB hub) into the USB-A port on the Moshi adapter.
- Verify Connection: Your host device should automatically detect the connected USB-A device. You can verify this through your operating system's device manager or file explorer.

Image 2: Diagram highlighting the standard USB-A port and the USB-C connector with aluminum housings and reinforced stress relief points.

Image 3: The Moshi USB-C to USB 3.1 Adapter connected to a MacBook's USB-C port, ready for use with a USB-A device.
3. Operating Instructions
Once connected, the Moshi USB-C to USB 3.1 Adapter functions as a bridge between your USB-C enabled device and standard USB-A peripherals.
- Data Transfer: The adapter supports USB 3.1 Gen 1 specifications, enabling data transfer speeds of up to 5 Gbps. This is suitable for transferring large files quickly between your host device and connected storage devices.
- Power Output: The adapter can provide up to 3 amps of power output. This allows you to charge or sync compatible devices like iPhones, iPads, or iPods when connected via a USB cable to the adapter.
- Peripheral Connectivity: Use the adapter to connect various USB-A peripherals such as keyboards, mice, printers, scanners, or USB hubs to expand your connectivity options.
Ensure that your host device's USB-C port supports the necessary power and data specifications for the connected USB-A device to function optimally.
4. Maintenance
To ensure the longevity and optimal performance of your Moshi USB-C to USB 3.1 Adapter, follow these simple maintenance guidelines:
- Cleaning: Gently wipe the adapter's exterior with a soft, dry, lint-free cloth. Avoid using harsh chemicals, abrasive cleaners, or solvents, as these can damage the anodized aluminum finish.
- Storage: When not in use, store the adapter in a clean, dry place away from extreme temperatures and direct sunlight.
- Handling: Avoid bending or twisting the cable excessively, especially near the connectors, to prevent damage to the internal wiring and stress relief points.
- Protection: The aluminum housing helps protect against electromagnetic interference; however, avoid exposing the adapter to strong magnetic fields.
5. Troubleshooting
If you encounter issues with your Moshi USB-C to USB 3.1 Adapter, try the following troubleshooting steps:
- No Device Detection:
- Ensure both the USB-C connector and the USB-A device are fully and securely plugged into their respective ports.
- Try connecting the adapter to a different USB-C port on your host device.
- Test the USB-A device directly with a standard USB-A port (if available) to confirm it is functioning correctly.
- Restart your host device.
- Slow Data Transfer:
- Verify that both your host device's USB-C port and the connected USB-A device support USB 3.0/3.1 speeds. Older USB 2.0 devices will operate at slower speeds.
- Ensure no other high-bandwidth devices are simultaneously using the same USB controller on your host device.
- Charging Issues:
- Confirm that the connected device requires 3A or less for charging.
- Ensure the USB cable used for charging is functional and properly connected.
- Some host devices may have limited power output on their USB-C ports.
- Intermittent Connection:
- Check for any physical damage to the adapter's cable or connectors.
- Ensure the connection points are clean and free of debris.
If problems persist, refer to the support section for further assistance.
6. Specifications
| Model Number | 99MO084200 |
| Brand | Moshi |
| Connector Type (Host) | USB-C |
| Connector Type (Device) | USB-A (Standard USB 3.1 Gen 1) |
| Data Transfer Speed | Up to 5 Gbps (USB 3.1 Gen 1) |
| Power Output | Up to 3 Amps |
| Material | Anodized Aluminum Casing |
| Color | Silver |
| Item Weight | 0.564 ounces (approx. 16 grams) |
| Dimensions (LxWxH) | 6.93 x 2.01 x 0.79 inches (approx. 17.6 x 5.1 x 2.0 cm) |
| Compatibility | MacBook & other devices supporting USB-C port |
7. Warranty Information
Moshi products are covered by a 10-Year Global Warranty. This warranty program ensures long-term support for your product. For detailed information regarding warranty terms, conditions, and registration, please visit the official Moshi website's Warranty Info Page.
Link: Moshi Official Warranty Page (Example link, actual link may vary)
8. Support
For further assistance, technical support, or frequently asked questions, please visit the official Moshi support website.
- Online Support: Access FAQs, user guides, and contact forms on the Moshi support portal.
- Contact Information: Find contact details for customer service if direct assistance is required.
Link: Moshi Official Support Page (Example link, actual link may vary)