1. Introduction
Thank you for purchasing the VOLT PLUS TECH PRO Touch Wireless Earbuds. This manual provides detailed instructions on how to set up, operate, and maintain your new earbuds. Please read this manual carefully before use to ensure optimal performance and longevity of your device.
These earbuds feature Bluetooth 5.3 connectivity, a digital LED display charging case with a 2,000mAh power bank, IPX4 water resistance, 9D noise reduction, and quad microphones for clear calls.
2. Package Contents
Please check the package for the following items:
- PRO Touch Wireless Earbuds (Left and Right)
- Charging Case with Digital LED Display
- USB-C Charging Cable
- User Manual
- Ear Tips (Small, Medium, Large)
3. Product Overview
Familiarize yourself with the components of your PRO Touch Wireless Earbuds.

Figure 3.1: PRO Touch Wireless Earbuds in their charging case, displaying battery levels on the LED screen.
The charging case features a digital LED display that shows the battery percentage of the case and the individual earbuds. The earbuds are designed for a secure and comfortable fit, with touch controls for various functions.

Figure 3.2: Earbuds and case highlighting key features like Bluetooth V5.3, noise reduction, and water resistance.
The earbuds are equipped with Bluetooth 5.3 for stable connectivity, CVC 8.1 intelligent noise reduction, and an IPX4 waterproof nano-coating, making them suitable for various activities.
4. Setup and First Use
4.1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case.
- Place both earbuds into the charging case. Ensure they are correctly seated; the LED indicators on the earbuds will light up.
- Connect the USB-C charging cable to the charging port on the case and the other end to a USB power source (e.g., wall adapter, computer USB port).
- The digital LED display on the case will show the charging status and battery percentage.
- Once fully charged, the display will indicate 100%. Disconnect the charging cable.

Figure 4.1: The charging case can also function as a power bank to charge your mobile device.
The charging case has a 2,000mAh battery, providing up to 20+ hours of additional charge for the earbuds, extending total play time to 25+ hours. It can also be used to charge other small devices via its USB-C port.
4.2. Pairing with Your Device
The earbuds support automatic pairing for convenience.
- Power On: Remove both earbuds from the charging case. They will automatically power on. A blue indicator light will flash to confirm. If they do not power on automatically, press and hold the touch area on each earbud for 3-5 seconds until the blue indicator light flashes.
- Bluetooth Activation: On your mobile device (e.g., smartphone, tablet), go to the Bluetooth settings and ensure Bluetooth is turned on.
- Search and Connect: Search for available Bluetooth devices. You should find "YD03" in the list. Select "YD03" to pair.
- Confirmation: Once successfully connected, the earbuds will provide a voice prompt stating "Connected".

Figure 4.2: Earbuds automatically connect to your device upon removal from the case.
The earbuds feature a complete binaural separation design, allowing for free switching between single or dual earbud operation.
5. Operating Instructions
The PRO Touch Wireless Earbuds utilize touch controls for various functions.

Figure 5.1: Touch control functions for music playback, call management, and voice assistant activation.
| Function | Action |
|---|---|
| Power On | Remove from charging case (automatic) or press and hold touch area for 3-5 seconds. |
| Power Off | Place back into charging case (automatic) or press and hold touch area for 5-7 seconds. |
| Play/Pause Music | Single touch on either earbud. |
| Next Song | Double touch on the right earbud. |
| Previous Song | Double touch on the left earbud. |
| Volume Up | Triple touch on the right earbud. |
| Volume Down | Triple touch on the left earbud. |
| Answer/End Call | Single touch on either earbud. |
| Reject Call | Press and hold touch area for 2 seconds. |
| Activate Voice Assistant (Siri/Google Assistant) | Press and hold touch area for 1 second. |
The earbuds provide clear sound for music at 120Hz and phone calls at 150Hz, enhanced by CVC 8.1 noise reduction technology.
6. Maintenance and Care
Proper care will extend the life of your earbuds.
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Do not use harsh chemicals or abrasive materials.
- Water Resistance: The earbuds have an IPX4 waterproof nano-coating, protecting them from splashes and sweat. They are ideal for running, yoga, and gym activities. Note: The charging case is NOT waterproof. Avoid exposing the charging case to water or excessive moisture.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
- Battery Care: To preserve battery life, avoid fully discharging the earbuds and case frequently. Charge them regularly, even if not used for extended periods.
7. Troubleshooting
If you encounter issues with your earbuds, refer to the following common solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Earbuds not powering on. |
|
| Earbuds not pairing with device. |
|
| Only one earbud is working. |
|
| Low volume or poor sound quality. |
|
| Charging case not charging. |
|
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | F9 |
| Brand | VOLT PLUS TECH |
| Connectivity Technology | Bluetooth Wireless 5.3 |
| Wireless Communication Technology | Bluetooth |
| Headphones Jack | USB-C |
| Compatible Devices | Xiaomi Redmi A2 (and other Bluetooth-enabled devices) |
| Control Type | Media Control, Touch |
| Noise Control | Active Noise Cancellation (CVC 8.1) |
| Water Resistance Level | IPX4 Water Resistant (Earbuds only) |
| Charging Case Battery Capacity | 2,000mAh |
| Total Play Time | Up to 25+ Hours (with charging case) |
| Earbud Play Time | 5+ Hours (single charge) |
| Frequency Response | 48000 KHz |
| Impedance | 25.94 Ohm |
| Item Weight | 4 Ounces |
| Product Dimensions | 1.5 x 1 x 1.5 inches |
| Material | Hi-Impact Plastic, Stainless Steel, Titanium |
| Color | Black |
9. Warranty and Support
For warranty information and technical support, please refer to the product packaging or contact the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: VOLT PLUS TECH
For further assistance, please visit the official VOLT PLUS TECH website or contact their customer service.





