YOBYBO NOTE20
YOBYBO NOTE20 Wireless Earphones User Manual
Model: NOTE20
1. Introduction
Thank you for purchasing the YOBYBO NOTE20 Wireless Earphones. This manual provides essential information for the safe and efficient use of your device. Please read it thoroughly before use and retain it for future reference.
2. Package Contents
Verify that all items are present in the package:
- YOBYBO NOTE20 Earphones (Left and Right) x1
- Charging Case x1
- Replacement Short Earpieces x2 sets (various sizes)
- USB Type-C Charging Cable x1
- User Manual (Japanese) x1
If any items are missing or damaged, please contact customer support.

Image: The YOBYBO NOTE20 earphones, charging case, extra eartips, and USB-C charging cable neatly arranged in their packaging.
3. Product Overview
The YOBYBO NOTE20 earphones feature a compact and lightweight design, weighing approximately 4.5g per earbud and 35.6g with the charging case. The charging case has a slim profile of 13.5mm. The earphones utilize a non-symmetrical design based on human engineering principles, incorporating patented short earpieces for enhanced comfort and fit.
Key Features:
- Ultra-Lightweight Design: Each earbud weighs only 4.5g, and the charging case is exceptionally thin.
- Ergonomic Fit: Patented short earpieces and a non-symmetrical design prevent ear canal discomfort, allowing for comfortable long-term wear.
- Stable Bluetooth 5.1 Connection: Equipped with an Airoha chip and MCSync technology for stable, low-latency audio transmission and independent left/right earbud connection.
- Intuitive Touch Controls: Manage music playback and calls with simple touch gestures.
- Extended Battery Life: Up to 5 hours of playback per earbud, and 25-30 hours total with the charging case.
- USB Type-C Charging: Modern and convenient charging interface.

Image: A person wearing the YOBYBO NOTE20 earphone, demonstrating its compact and discreet fit.
4. Setup
4.1. Charging the Earphones and Case
- Place both earphones into the charging case.
- Connect the USB Type-C charging cable to the charging port on the case and a power source (e.g., USB wall adapter, computer USB port).
- The indicator lights on the charging case will illuminate to show charging status. A full charge for the case typically takes approximately 1 hour.
- Once fully charged, the indicator lights may change or turn off. Disconnect the charging cable.
The earphones provide approximately 4-5 hours of continuous playback on a single charge. The charging case extends total playback time to about 25-30 hours.

Image: A visual representation of the YOBYBO NOTE20's battery life, indicating 25 hours maximum playback with the case, 5 hours for earbuds alone, and 1 hour required for charging.
4.2. Bluetooth Pairing
- Ensure the earphones are charged.
- Open the charging case. The earphones will automatically enter pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "YOBYBO NOTE20" from the list of found devices to connect.
- Once connected, a voice prompt or indicator light change will confirm successful pairing.
The earphones support independent connection for each earbud, allowing you to use either the left or right earbud individually. Simply remove one earbud from the case to use it in mono mode.

Image: A diagram showing the YOBYBO NOTE20 earphones connected via Bluetooth 5.1 to a smartphone and laptop, emphasizing stable and high-speed communication.
5. Operating Instructions
5.1. Wearing the Earphones
The NOTE20 earphones are designed for a comfortable and secure fit. To achieve the best fit:
- Gently insert the earbud into your ear canal.
- Rotate the earbud slightly to find the optimal angle that feels snug and comfortable. The non-symmetrical design allows for a personalized fit.

Image: A diagram illustrating how to rotate the earbud (up to 60 degrees) to achieve a comfortable and secure fit for small, medium, and large ear sizes.
5.2. Touch Controls
The NOTE20 earphones feature touch-sensitive controls for various functions:
| Action | Function |
|---|---|
| Single Tap (Left/Right Earbud) | Play/Pause music, Answer/End call |
| Double Tap (Right Earbud) | Next Track |
| Double Tap (Left Earbud) | Previous Track |
| Long Press (Left/Right Earbud) | Reject call |
6. Maintenance
To ensure the longevity and optimal performance of your YOBYBO NOTE20 earphones, follow these maintenance guidelines:
- Cleaning: Regularly wipe the earphones and charging case with a soft, dry, lint-free cloth. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Earpieces: Remove the earpieces periodically and clean them with a damp cloth. Ensure they are completely dry before reattaching them to the earphones.
- Charging Contacts: If you notice charging issues, gently clean the charging contacts on both the earphones and inside the case with a dry cotton swab.
- Storage: When not in use, store the earphones in their charging case to protect them from dust and damage. Store in a cool, dry place away from direct sunlight and extreme temperatures.
- Water Resistance: The earphones are waterproof. However, avoid prolonged exposure to water or submersion. Dry them thoroughly if they get wet.
7. Troubleshooting
If you encounter issues with your YOBYBO NOTE20 earphones, refer to the following common problems and solutions:
| Problem | Possible Solution |
|---|---|
| Earphones do not turn on. | Ensure the earphones are charged. Place them in the charging case and connect the case to a power source. |
| Cannot pair with device. | Make sure Bluetooth is enabled on your device. Ensure the earphones are in pairing mode (open the charging case). Try forgetting the device in your Bluetooth settings and re-pairing. |
| No sound or low volume. | Check the volume level on both your device and the earphones. Ensure earphones are properly seated in your ears. Clean any debris from the earbud nozzles. |
| Intermittent connection or audio drops. | Ensure your device is within the Bluetooth range (typically 10 meters/33 feet) and there are no major obstructions. Avoid environments with strong Wi-Fi or other wireless interference. Fully charge both earphones and the case. |
| Touch controls are unresponsive. | Ensure your fingers are clean and dry. Try restarting the earphones by placing them back in the case and then taking them out again. |
| Only one earbud is working. | Place both earbuds back into the charging case, close the lid, wait a few seconds, then open the lid and remove both earbuds simultaneously. This should re-establish the stereo connection. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | YOBYBO NOTE20 |
| Connectivity Technology | Wireless (Bluetooth) |
| Wireless Communication Technology | Bluetooth |
| Headphone Jack | USB Type-C (for charging case) |
| Noise Control | Sound Isolation |
| Included Components | Wireless Charging Case |
| Control Type | Call Control |
| Cable Feature | Retractable |
| Product Weight | 35.6 grams (total with case) |
| Water Resistance Level | Waterproof |
| Batteries | 3 Lithium Ion batteries (included) |
| Color | White (for this variant) |
| Ear Placement | In-Ear |
| Headphone Form Factor | Earphones |
| Impedance | 32 Ohm |
9. Warranty and Support
The YOBYBO NOTE20 earphones come with a 1-year manufacturer's warranty. For warranty claims, exchanges, or any product-related inquiries, please contact our customer support. You can register with our official LINE account (if applicable, check the card included in your package) or visit the official YOBYBO website for support.