1. Product Overview
The DUDAO U4A is an open-ear wireless earbud designed for the right ear, offering a blend of audio enjoyment and environmental awareness. Its ear-hook design ensures a secure and comfortable fit for various activities.

Image: The DUDAO U4A Open-Ear Wireless Earbud in black and almond colors, illustrating its design that rests on the ear rather than inside it.
This earbud features Bluetooth 5.3 technology for stable connectivity, a 13mm composite diaphragm driver for clear sound, and a long battery life suitable for extended use.
2. Package Contents
Verify that all items are present in the package:
- 1 x DUDAO U4A Single Earbud (Right Ear)
- 1 x Type-C Charging Cable
- 1 x User Manual (this document)
3. Setup
3.1 Initial Charging
Before first use, fully charge the earbud for approximately one hour. Subsequent charges typically take about 30 minutes for up to 30 hours of playtime.
- Connect the provided Type-C charging cable to the charging port on the earbud.
- Connect the other end of the cable to a compatible USB power source (e.g., computer USB port, USB wall adapter).
- The indicator light on the earbud will show charging status. Refer to the earbud's specific LED indicators for full charge notification.
3.2 Wearing the Earbud
The DUDAO U4A is designed for the right ear only. Its ear-hook design provides a stable and comfortable fit.
- Gently place the earbud over your right ear, ensuring the ear-hook rests securely behind your ear.
- Adjust the earbud so the speaker portion is positioned near your ear canal, allowing sound to be heard clearly without blocking ambient noise.

Image: A close-up view of the DUDAO U4A earbud correctly worn on the right ear, illustrating its open-ear and ear-hook design.
3.3 Bluetooth Pairing
To connect the earbud to your device:
- Power On: Press and hold the multi-function button on the earbud until the indicator light flashes, indicating it is in pairing mode.
- Activate Bluetooth: On your smartphone or other Bluetooth-enabled device, go to the Bluetooth settings and ensure Bluetooth is turned on.
- Select Device: In the list of available devices, locate and select "DUDAO U4A".
- Confirm Connection: Once connected, the earbud's indicator light will change (e.g., solid blue or off), and you may hear an audible confirmation.
- If prompted for a password, enter "0000".
4. Operating Instructions
4.1 Power On/Off
- Power On: Press and hold the multi-function button for approximately 3 seconds.
- Power Off: Press and hold the multi-function button for approximately 5 seconds.
4.2 Music Playback
- Play/Pause: Single tap the multi-function button.
- Next Track: Double tap the multi-function button.
- Previous Track: Triple tap the multi-function button.
4.3 Call Management
- Answer/End Call: Single tap the multi-function button.
- Reject Call: Press and hold the multi-function button for 2 seconds.
- Redial Last Number: Double tap the multi-function button when not on a call.

Image: The DUDAO U4A earbud in use during an office call, highlighting its suitability for extended communication.

Image: The DUDAO U4A earbud being used by a driver, demonstrating its open-ear design for maintaining situational awareness during travel.
4.4 Voice Assistant
The DUDAO U4A supports Google Assistant. To activate:
- Activate Voice Assistant: Press and hold the multi-function button for 2 seconds (when not on a call).
5. Maintenance
5.1 Cleaning
- Wipe the earbud regularly with a soft, dry, lint-free cloth.
- Do not use harsh chemicals, cleaning solvents, or strong detergents.
5.2 Storage
- Store the earbud in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid storing in dusty environments.
5.3 Water Resistance
The DUDAO U4A is water resistant. This means it can withstand splashes and sweat, making it suitable for sports and everyday use. However, it is not designed for submersion in water. Avoid exposing it to heavy rain or showering with it.
6. Troubleshooting
6.1 Earbud Does Not Power On
- Ensure the earbud is fully charged. Connect it to the charging cable and allow it to charge for at least 30 minutes.
- Try pressing and holding the multi-function button for a longer duration (5-7 seconds) to ensure it's not just in pairing mode.
6.2 Cannot Pair with Device
- Ensure the earbud is in pairing mode (indicator light flashing).
- Turn off and then on your device's Bluetooth.
- Move the earbud closer to your device (within 10 meters).
- Forget "DUDAO U4A" from your device's Bluetooth list and attempt to pair again.
- Ensure no other Bluetooth devices are interfering with the connection.
6.3 No Sound or Low Volume
- Check the volume levels on both the earbud and your connected device.
- Ensure the earbud is properly connected to your device.
- Try playing audio from a different application or source.
6.4 Poor Call Quality
- Ensure the earbud's microphone is not obstructed.
- Move to an area with less background noise.
- Check your device's network signal strength.
7. Specifications

Image: Detailed view of the 13mm speaker driver, responsible for the earbud's sound output.
| Feature | Detail |
|---|---|
| Model Name | U4A Open Ear Single Headset |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.3 |
| Bluetooth Range | 10 Metres |
| Audio Driver Size | 13 Millimetres |
| Battery Life | Up to 30 Hours |
| Charging Time | 30 Minutes (for 30 hours playtime) |
| Charging Port | Type-C |
| Control Type | Touch, Button, Google Assistant |
| Ear Placement | On Ear (Right Ear Only) |
| Form Factor | Open Ear, Earhook |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 20 Grams |
| Product Dimensions | 5 x 3 x 0.79 cm |
| Water Resistance Level | Water Resistant (Sweatproof) |
| Noise Control | Partial Noise Isolation |
8. Warranty and Support
8.1 Warranty Information
This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included in your product packaging or contact DUDAO customer support.
Extended warranty options may be available from third-party providers. Please check with your retailer for details.
8.2 Customer Support
For technical assistance, product inquiries, or warranty claims, please contact DUDAO customer support:
- Email: customercare@dudao.in
- Phone: +91 9310681651
- Address: DUDAO INDIA, 101 Mall Road, Kingsway Camp, GTB Nagar Metro Station Gate No 1, NEW DELHI, DELHI 110009
Please have your product model number (U4A) and purchase details ready when contacting support.





