1. Introduction
Thank you for choosing the Fonus TWS Wireless Earbuds. This manual provides detailed instructions for the proper use, setup, operation, and maintenance of your new earbuds. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
2. Product Overview
2.1 Package Contents
- TWS Wireless Earbuds (Left and Right)
- Portable Charging Case
- USB Charging Cable
- Silicone Ear Tips (various sizes)
- User Manual
2.2 Key Features
- True Wireless Stereo (TWS) technology for authentic sound.
- Superior sound quality with powerful deep bass from 8mm speaker drivers.
- Comfortable and secure fit with flexible silicone ear tips.
- IPX8 sweat/water-resistant design, suitable for workouts.
- Intuitive touch controls for music and calls.
- Built-in HD microphones for clear calls with noise suppression.
- Extended playtime: Up to 6 hours on a single charge, and an additional 30 hours with the charging case.
- Fast charging capability.
2.3 Product Components
The Fonus TWS Earbuds consist of two independent earbuds and a portable charging case. The charging case features a digital display indicating battery levels for both the case and individual earbuds.

Image: Fonus TWS Wireless Earbuds shown inside their open charging case, displaying battery percentages for both the case and the individual earbuds. The earbuds are black with metallic accents.

Image: A cross-section diagram illustrating the 8mm sound speaker embedded within the earbud, designed to produce authentic sound and powerful bass performance.

Image: A diagram illustrating the battery life and charging capabilities. It shows 5 hours talk time, 7 hours listening time, 120 hours total playtime with the charging case, and 10 minutes of charge providing 1 hour of playtime. The charging case is depicted with a 3500 mAh battery.
3. Setup
3.1 Initial Charging
- Before first use, place both earbuds into the charging case.
- Connect the USB charging cable to the charging port on the case and to a USB power source (e.g., computer, wall adapter).
- The digital display on the charging case will show the charging status. Ensure both earbuds and the case are fully charged.
3.2 Pairing with Your Device
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "Fonus TWS Earbuds" or a similar name in the list of available Bluetooth devices.
- Select the earbuds to connect. Once connected, you will hear a confirmation tone.
- If pairing fails, place the earbuds back into the case, close the lid, wait a few seconds, and then repeat the steps.

Image: A visual representation of the TWS (True Wireless Stereo) technology and Bluetooth 5.0, highlighting faster transmission speed and stable connectivity.
3.3 Fitting the Earbuds
- Choose the silicone ear tips that provide the most comfortable and secure fit for your ears. A good seal is crucial for optimal sound quality and noise cancellation.
- Gently insert each earbud into your ear canal and twist slightly to secure it.
4. Operating Instructions
4.1 Touch Controls
The earbuds feature intelligent touch controls on their outer surface.

Image: A diagram detailing the touch control functions.
- Play/Pause: Press Once (L/R)
- Skip Backwards: Press Twice (L)
- Skip Forwards: Press Twice (R)
- Answer/Hang up Call: Press Once (L/R)
- Volume Down: Long Press (L)
- Volume Up: Long Press (R)
- Activate Voice Assistant (Siri): Press Thrice (L/R)
4.2 Power On/Off
- Power On: Open the charging case, or long-press the touch area on both earbuds for 3 seconds.
- 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.
4.3 Single Earbud Mode
You can use either the left or right earbud independently. Simply take one earbud out of the case, and it will automatically connect to your device. The other earbud can remain in the case or be powered off.
5. Maintenance
5.1 Cleaning
- Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
- Remove ear tips and clean them with mild soap and water, then dry thoroughly before reattaching.
- Do not use abrasive cleaners, alcohol, or chemical solvents.
- Ensure charging contacts on both earbuds and case are clean and dry.
5.2 Storage
- When not in use, always store the earbuds in their charging case to protect them and keep them charged.
- Store in a cool, dry place away from extreme temperatures and direct sunlight.
5.3 Battery Care
- To preserve battery life, charge the earbuds and case regularly, even if not used frequently.
- Avoid fully depleting the battery for extended periods.
6. Troubleshooting
Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not pairing with device. | Bluetooth off, earbuds not in pairing mode, interference. | Ensure Bluetooth is on. Place earbuds in case, close, then reopen. Forget device on phone and re-pair. |
| Only one earbud working. | One earbud not connected, low battery. | Ensure both earbuds are charged. Place both in case, close, then reopen to re-sync. |
| No sound or low volume. | Volume too low, ear tips not sealed, dirty speaker mesh. | Increase device volume. Adjust earbud fit. Clean speaker mesh. |
| Charging case not charging. | Faulty cable/adapter, dirty charging port. | Try a different USB cable and power adapter. Clean charging port. |
7. Specifications
- Model: Fo-FO10817R1L-133
- Brand: Fonus
- Connectivity: True Wireless Stereo (TWS), Bluetooth 5.0
- Speaker Driver Size: 8mm
- Water Resistance: IPX8 (Sweat/Water-Resistant)
- Playtime (Single Charge): Up to 6 hours
- Total Playtime (with Charging Case): Up to 30 hours
- Charging Case Battery: 3500 mAh
- Microphones: Built-in HD microphones with noise suppression
- Color: Black
- Item Weight: 4 ounces
- ASIN: B0DN2PVKQP
8. Warranty and Support
Fonus products are designed and manufactured to the highest quality standards. For warranty information, technical support, or customer service inquiries, please refer to the contact information provided with your product packaging or visit the official Fonus website.
Online Support: Visit Fonus Brand Store on Amazon