YOBYBO CARD20 PRO Bluetooth Earphones User Manual

1. Introduction

Thank you for choosing the YOBYBO CARD20 PRO Bluetooth Earphones. These earphones represent the 4th generation of YOBYBO's designer earphone brand, offering significant upgrades in functionality. Designed for ultimate portability and comfort, the CARD20 PRO features an ultra-thin and lightweight design, advanced Bluetooth 5.2 connectivity, and enhanced audio quality. This manual provides detailed instructions to help you get the most out of your new earphones.

2. What's in the Box

• CARD20 PRO Earphones (Left & Right)
• Charging Case
• USB Charging Cable (Type-C)
• User Manual (Japanese)

3. Product Overview

Familiarize yourself with the components of your YOBYBO CARD20 PRO earphones.

Image: YOBYBO CARD20 PRO Earphones and Charging Case. The image shows the two silver-white earbuds and their matching oval-shaped charging case, highlighting their compact and sleek design.

Image: Diagram of YOBYBO CARD20 PRO Earbud Components. This diagram illustrates the internal structure and key parts of a single earbud, including the dynamic driver, battery, and touch control area.

Earbud Features:

• Touch Control Area: For managing music playback, calls, and voice assistant.
• LED Indicator: Shows pairing status, charging status, and power.
• Charging Contacts: Connects with the charging case for power.
• Microphone: For calls and voice commands.

Charging Case Features:

• Earbud Slots: Securely holds and charges the earbuds.
• Charging Port (USB Type-C): For charging the case.
• LED Indicators: Shows the charging status of the case.

4. Setup

4.1 Initial Charging

Before first use, fully charge the earphones and the charging case.

1. Place both earbuds into the charging case. Ensure the charging contacts align. The red LED on the earbuds should flash, indicating charging. If not, adjust the earbuds or clean the contacts.
2. Connect the USB Type-C charging cable to the charging port on the case and a power source (e.g., USB wall adapter).
3. The case's LED indicators will show charging progress. A full charge for the earbuds takes approximately 1 hour.

4.2 Pairing with Your Device

The earphones will automatically enter pairing mode when taken out of the case.

1. Ensure Bluetooth is enabled on your smartphone or other device.
2. Open the charging case and take out both earbuds. The earbuds will automatically power on and enter pairing mode (LEDs will flash red and blue alternately).
3. On your device, go to Bluetooth settings and search for new devices.
4. Select "CARD20 PRO" from the list of available devices to connect.
5. Once connected, the earbud LEDs will stop flashing, and a voice prompt will confirm the connection.

Note: If pairing fails, place the earbuds back into the case, close the lid, wait a few seconds, and then repeat the pairing process. For advanced troubleshooting or resetting, refer to the Troubleshooting section.

5. Operating Your Earphones

5.1 Touch Controls

The CARD20 PRO earphones feature intuitive touch controls on both earbuds. The functions are as follows:

5.2 Single Earbud Use

The CARD20 PRO supports using a single earbud independently. Simply take one earbud out of the charging case, and it will automatically connect to your device if previously paired. This allows for flexible use, such as making calls while keeping one ear open to your surroundings.

Image: YOBYBO CARD20 PRO Touch Controls and Single Earbud Use. This image visually demonstrates the touch control gestures and the flexibility of using either the left or right earbud independently for calls or music.

6. Maintenance

To ensure the longevity and optimal performance of your CARD20 PRO earphones, follow these maintenance guidelines:

• Cleaning: Regularly clean the earbuds, especially the charging contacts and ear tips, with a soft, dry, lint-free cloth. If charging issues occur, gently wipe off any dust or debris from the charging contacts on both the earbuds and the case.
• Storage: When not in use, always store the earbuds in their charging case to protect them from dust, dirt, and damage.
• Avoid Extreme Conditions: Do not expose the earphones to extreme temperatures, humidity, or corrosive substances. While they are IPX4 water-resistant, avoid submerging them in water.
• Charging: Use only the provided USB charging cable. Avoid using third-party cables that may not meet specifications, especially USB-C to USB-C cables, which are not compatible for charging this device.

7. Troubleshooting

If you encounter any issues with your CARD20 PRO earphones, please refer to the solutions below:

7.1 Earbuds Not Charging

1. Check Insulation Seal: Ensure that any protective insulation seals on the earbud charging contacts have been completely removed.
2. Clean Contacts: Wipe off any dust or debris from the charging contacts on both the earbuds and inside the charging case. Try inserting and removing the earbuds from the case several times to ensure good contact.
3. LED Indicator: When earbuds are placed in the case, the red LED on the earbuds should flash. If it does not, the contact is not good. Adjust the earbuds until the red LED flashes.

7.2 Charging Case Not Charging

1. Change Connection Environment: Try charging the case using a different USB port or wall adapter. Always use the included USB charging cable. Note that USB-C to USB-C cables are not compatible for charging this device.
2. Use Wall Adapter: Charging from a computer's USB port may result in unstable charging. It is recommended to use a dedicated charging adapter.
3. Charge Case Only: Remove the earbuds from the case and charge the case alone for about 30 minutes. Then, reinsert the earbuds and check if charging resumes.
4. LED Indicators: If the 3 LED lights on the case do not flash even after charging, the charging case may be defective.

7.3 Earbuds Remain Connected When in Case / Pairing Issues

If the earbuds do not disconnect or if you experience pairing difficulties, perform a reset:

Smartphone and Earphone Bluetooth Reset:

1. Ensure both the charging case and earphones are properly charged.
2. On your smartphone, go to Bluetooth settings,