1. Product Overview
The UGREEN USB C to 3.5mm Audio and Charger Adapter (Model CM721) is designed to expand the functionality of your USB-C devices, allowing for simultaneous audio output and fast charging. It integrates a high-performance DAC chip for superior sound quality and supports various fast charging protocols.

Key Features:
- Simultaneous Audio & Charging: Listen to music, make calls, or game while fast charging your device.
- Hi-Res Audio: Built-in 32Bit/384KHz DAC chip for high-fidelity, lossless, and noise-free sound with an SNR of >110 dBFS.
- PD 60W Fast Charging: Supports Power Delivery (PD3.0/2.0), Quick Charge (QC4.0/3.0), Galaxy AFC, Huawei SCP, and USB-C fast charging protocols.
- Wide Compatibility: Compatible with a broad range of USB-C devices including iPhones (15 Pro Max/15 Pro/15 Plus/15), Samsung Galaxy (S24 Ultra/S23/S22 Ultra/S21/Note), Pixel (8/8 Pro/7/7 Pro/6/6 Pro), iPad Air/Pro, PS4/PS5/Switch, MacBook Air/Pro, XPS, and Huawei Mate 60 Pro.
- Durable Design: Features a magnetic aluminum alloy case, strain relief, and nylon braided cable for enhanced durability and a 20,000+ bend lifespan.
- Microphone & In-Line Control Support: Allows for voice input and control of audio playback and calls.
2. Setup and Connection
Follow these steps to connect your UGREEN USB C to 3.5mm Audio and Charger Adapter:
- Connect to USB-C Device: Insert the USB-C male connector of the adapter into the USB-C port of your smartphone, tablet, laptop, or gaming console.
- Connect Audio Device: Plug your 3.5mm headphones, earphones, speaker, or car stereo cable into the 3.5mm audio jack on the adapter.
- Connect Charger (Optional): For simultaneous charging, connect a USB-C charging cable from a compatible PD fast charger to the USB-C female port on the adapter. Ensure your charger and cable support PD fast charging for optimal performance.

Note: This adapter does not support data transmission through its charging port.
3. Operating Instructions
Audio Playback:
Once connected, your device should automatically recognize the adapter and route audio through the 3.5mm jack. Adjust volume directly from your device or using in-line controls on your headphones if supported.

Charging Functionality:
When a compatible PD fast charger is connected to the adapter's USB-C female port, your device will begin charging. The adapter supports up to 60W Power Delivery, allowing for rapid charging even during intensive use like gaming.

Microphone and In-Line Control:
The adapter supports microphones and in-line controls found on most 3.5mm headsets, enabling you to take calls, adjust volume, and manage playback directly from your headset.

Product Demonstration Video:
This video demonstrates the UGREEN USB C to 3.5mm Audio and Charger Adapter in use, highlighting its audio, charging, and gaming capabilities, as well as its magnetic design.
4. Maintenance and Care
To ensure the longevity and optimal performance of your UGREEN adapter, please follow these maintenance guidelines:
- Keep Clean: Regularly wipe the adapter with a soft, dry cloth to remove dust and debris. Avoid using harsh chemicals or abrasive materials.
- Avoid Extreme Conditions: Do not expose the adapter to extreme temperatures, humidity, or direct sunlight.
- Handle with Care: Despite its robust design, avoid excessive bending, twisting, or pulling on the cable and connectors.
- Proper Storage: When not in use, store the adapter in a cool, dry place. The magnetic design allows for convenient and tangle-free storage.

5. Troubleshooting
If you encounter issues with your UGREEN adapter, refer to the following common problems and solutions:
- No Audio Output:
- Ensure the adapter is fully plugged into your USB-C device.
- Verify that your 3.5mm audio device (headphones, etc.) is securely connected to the adapter.
- Check your device's audio settings to ensure output is directed to the adapter.
- Test with another 3.5mm audio device to rule out a faulty headset.
- Ensure your USB-C device supports audio output via its USB-C port.
- No Charging:
- Confirm that the USB-C charging cable and PD adapter are securely connected to the adapter and a power source.
- Verify that your charging cable and PD adapter are functional and support fast charging.
- Ensure your USB-C device supports PD fast charging.
- Try using a different charging cable or PD adapter.
- In-Line Controls/Microphone Not Working:
- Ensure your 3.5mm audio device has working in-line controls and a microphone.
- Check your device's settings for microphone input and audio control permissions.
- Compatibility Issues:
- Refer to the compatibility table in the specifications section to ensure your device is supported.
- Some devices may require specific drivers or firmware updates.
If the problem persists after trying these solutions, please contact UGREEN customer support.
6. Specifications
| Feature | Specification |
|---|---|
| Model Number | CM721 |
| Brand Name | UGREEN |
| Type | External |
| Interface Type | USB-C (Input), 3.5mm Audio (Output), USB-C PD (Input) |
| DAC Chip | 32Bit/384KHz |
| Signal-to-Noise Ratio (SNR) | >110 dBFS |
| PD Fast Charging | Up to 60W (PD3.0/2.0, QC4.0/3.0, Galaxy AFC, Huawei SCP, USB-C) |
| Data Transmission | Not Supported (via charging port) |
| Material | Magnetic Aluminum Alloy Case, Nylon Braided Cable |
| Cable Lifespan | 20,000+ bend lifespan |
| Dimensions (Approx.) | Length: 6.3 inches (16 cm), Width: 1.1 inches (2.8 cm) |
| Package | Yes |
Compatibility:

| Brand | Model | Charging | Music | Microphone | In-Line Control |
|---|---|---|---|---|---|
| iPhone | 15 Pro Max/15 Pro/15 Plus/15 | ✓ | ✓ | ✓ | ✓ |
| Galaxy | S24 Ultra/S23 Ultra/S22 Ultra | ✓ | ✓ | ✓ | ✓ |
| Pixel | 8/8 Pro/7/7 Pro/6/6 Pro | ✓ | ✓ | ✓ | |
| iPad | iPad Pro 2022/2021, iPad Air 4/5 | ✓ | ✓ | ✓ | ✓ |
| MacBook | MacBook Pro 2023/2022, MacBook Air 2022/2021 | ✓ | ✓ | ✓ | ✓ |
| XPS | 17/15/13 | ✓ | ✓ | ✓ | ✓ |
| HUAWEI | Mate 60 Pro | ✓ | ✓ | ✓ | ✓ |
Supported Audio Devices: Earphones, Headphones, Speakers, Car Stereo.
7. Warranty and Support
UGREEN is committed to providing high-quality products and excellent customer service. Your UGREEN USB C to 3.5mm Audio and Charger Adapter (Model CM721) comes with the following assurances:
- Free Returns: Enjoy free returns within 90 days of purchase.
- Fast Delivery Guarantee: If delivery is delayed, you may be eligible for a $1.00 coupon code. Refunds are also available if the package is lost or items are damaged during transit, or if no delivery occurs within 30 days.
- Security & Privacy: UGREEN ensures safe payments and protects your personal details, not sharing them with third parties without your consent.
For further assistance, technical support, or warranty claims, please contact UGREEN customer service through the official UGREEN website or your point of purchase.





