Introduction
Welcome to the user manual for your FVYAO F03 Invisible Sleep Earbuds. These earbuds are designed to provide a comfortable and discreet audio experience, especially for side sleepers, while offering advanced Bluetooth 5.4 connectivity and passive noise cancellation. Please read this manual carefully to ensure proper use and to maximize the lifespan of your device.
Safety Information
- Do not expose the earbuds or charging case to extreme temperatures, direct sunlight, or fire.
- Avoid using the earbuds at excessively high volumes for prolonged periods to prevent hearing damage.
- Keep the device away from water and moisture. If wet, dry thoroughly before use or charging.
- Do not attempt to disassemble, repair, or modify the device. This may void the warranty and cause damage.
- Keep out of reach of children and pets to prevent accidental ingestion of small parts.
- Dispose of the device and batteries according to local regulations.
Package Contents
- FVYAO F03 Invisible Sleep Earbuds (Left and Right)
- Charging Case
- USB-C Charging Cable
- User Manual
Product Overview
The FVYAO F03 earbuds are designed for minimal intrusion and maximum comfort. Each earbud features a soft silicone tip and a low-profile design, making them ideal for extended wear, especially while lying down. The compact charging case provides convenient storage and additional battery life.

Image: The FVYAO F03 Invisible Sleep Earbuds resting inside their open charging case, showcasing their compact and ergonomic design.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Place the earbuds into the charging case. Connect the USB-C charging cable to the charging port on the case and to a power source. The indicator light on the case will show charging status.

Image: The FVYAO F03 charging case with earbuds inside, illustrating the long battery life feature with a graphic of charging status.
2. Bluetooth Pairing
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode (indicator lights will flash).
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for available devices and select "Fvyao F03" from the list.
- Once connected, the indicator lights on the earbuds will stop flashing.
Video: This video demonstrates the unboxing, close-up features, and Bluetooth pairing process for the FVYAO Invisible Sleep Earbuds, showing how to connect them to a mobile device.
3. Wearing the Earbuds
Gently insert the earbuds into your ears. Adjust them until they fit snugly and comfortably. The low-profile design is specifically engineered to minimize pressure, even when lying on your side.

Image: A woman sleeping peacefully on her side, wearing the FVYAO F03 earbuds, highlighting their comfortable, low-pressure design for side sleepers.
Operating Instructions
The FVYAO F03 earbuds feature intuitive touch controls for easy management of audio and calls.
1. Power On/Off
- Power On: Open the charging case, or long-press the touch area on both earbuds for 3 seconds if they are out of the case and off.
- Power Off: Place the earbuds back into the charging case and close the lid, or long-press the touch area on both earbuds for 5 seconds.
2. Music Playback
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap the right earbud.
- Previous Track: Double tap the left earbud.
- Volume Up: Triple tap the right earbud.
- Volume Down: Triple tap the left earbud.
Video: This video demonstrates the comfortable fit, Bluetooth 5.4 pairing, and smart touch controls of the FVYAO Invisible Sleep Earbuds, showing how to manage music playback.
3. Call Management
- Answer/End Call: Single tap on either earbud.
- Reject Call: Long-press on either earbud for 2 seconds.
4. Noise Control
The FVYAO F03 earbuds feature passive noise cancellation, which physically blocks out external sounds due to their snug fit and silicone material. This helps to reduce ambient noise for a more focused listening or sleeping experience.

Image: A woman wearing FVYAO F03 earbuds in what appears to be a public setting, demonstrating the effectiveness of the deep noise reduction feature.
Maintenance
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the earbuds in their charging case to protect them from dust and damage.
- Battery Care: To preserve battery life, charge the earbuds and case regularly, even if not used frequently. Avoid fully discharging the battery for extended periods.
Troubleshooting
| Issue | Solution |
|---|---|
| Earbuds not powering on | Ensure earbuds and charging case are fully charged. |
| Unable to pair with device | Make sure Bluetooth is enabled on your device. Place earbuds back in case, close, then reopen to re-enter pairing mode. Forget previous pairing on your device and try again. |
| No sound or low volume | Check device volume and earbud volume. Ensure earbuds are properly seated in your ears. Reconnect Bluetooth. |
| Intermittent connection | Ensure your device is within the Bluetooth range (approx. 10 meters/33 feet) and there are no major obstructions. Avoid strong electromagnetic interference. |
| Earbuds uncomfortable or falling out | Adjust the earbuds' position in your ear canal. Ensure they are inserted correctly for a secure fit. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | FVYAO F03 |
| Bluetooth Version | 5.4 |
| Connectivity Technology | Wireless (Bluetooth) |
| Noise Control | Passive Noise Cancellation |
| Battery Life (Earbuds) | Up to 6 Hours (single charge) |
| Total Playtime (with case) | Up to 36 Hours |
| Control Method | Touch |
| Material | Silicone |
| Earpiece Shape | In-ear |
| Item Weight | 3.84 ounces |
| Special Features | Invisible, Microphone Included, Noise Cancellation, Touch Control |
Warranty and Support
FVYAO products are designed and manufactured to the highest quality standards. For warranty information, technical support, or customer service inquiries, please refer to the official FVYAO brand store or contact your retailer. You can visit the FVYAO Store for more details.
