1. Introduction
Thank you for choosing the VOLT PLUS TECH F9 Wireless V5.3 Bluetooth Earbuds. This manual provides essential information for setting up, operating, and maintaining your new earbuds. Please read it carefully before use.
Package Contents
- 2 x Wireless Earbuds
- 1 x 2000mAh Power Bank Charging Case
- 1 x USB-C Charging Cable
- 3 x Pairs of Ear Adapters (Small, Medium, Large)
- 1 x User Manual

Image 1.1: Contents included in the VOLT PLUS TECH F9 Earbuds package.
2. Product Overview
The VOLT PLUS TECH F9 earbuds feature a compact design with a multi-functional charging case that also serves as a power bank. The case includes an LED display to show battery levels.
Earbud Features
- Smart Touch Control: For managing music, calls, and voice assistant.
- Microphone: Built-in for calls.
- LED Indicator: On each earbud for status.
Charging Case Features
- 2000mAh Power Bank: Charges earbuds and can provide emergency charge for mobile devices.
- LED Digital Display: Shows battery percentage of the charging case and charging status of individual earbuds.
- USB-C Input: For charging the case.

Image 2.1: Overview of the earbuds and charging case with LED display.

Image 2.2: The bright LED display on the charging case indicates battery levels.
3. Setup and Pairing
Initial Charging
- Before first use, fully charge the charging case and earbuds.
- Connect the USB-C charging cable to the charging case and a power source. The LED display will show the charging progress.
- Place the earbuds into the charging case. They will begin charging automatically. The LED indicators on the earbuds will light up, and the case display will show their charging status.
Bluetooth Pairing
- Automatic Power On: Open the charging case, and the earbuds will automatically power on and enter pairing mode.
- Enable Bluetooth: On your device (e.g., smartphone), go to Bluetooth settings and enable Bluetooth.
- Select Device: Look for "F9" or similar in the list of available devices and select it to connect.
- Confirmation: Once connected, you will hear a confirmation tone, and the earbud LED indicators will change.
The earbuds feature Bluetooth V5.3 for a stable and efficient connection. They will automatically reconnect to the last paired device when taken out of the case.

Image 3.1: Fast Bluetooth auto-pairing process.
4. Operating Instructions
The F9 earbuds utilize smart touch controls for various functions.
Touch Control Functions
| Action | Left Earbud (L) | Right Earbud (R) |
|---|---|---|
| Play/Pause Music | Press once | |
| Next Song | Press twice quickly | N/A |
| Previous Song | N/A | Press twice quickly |
| Volume Up | N/A | Press three times |
| Volume Down | Press three times | N/A |
| Answer/End Call | Click/Double click | |
| Reject Call | Press and hold for 2 seconds | |
| Activate Voice Assistant (Siri/Google Assistant) | Press twice quickly | |

Image 4.1: Smart touch control guide for earbud functions.
5. Charging
Charging the Earbuds
Place the earbuds into the charging case. They will automatically begin charging. The LED display on the case will show the charging status for each earbud.
Charging the Case (Power Bank)
Connect the provided USB-C cable to the charging port on the case and to a USB power adapter. The LED display will show the battery percentage of the case as it charges.
Using the Case as a Power Bank
The 2000mAh charging case can also be used to provide an emergency charge to your mobile phone or other small devices. Connect your device's charging cable to the USB output port on the charging case.

Image 5.1: Charging your phone using the earbud charging case.
Battery Life
A full charge provides approximately 5 hours of music time and 6 hours of talk time for the earbuds. The 2000mAh charging case can recharge the earbuds multiple times, extending total usage to over 24 hours.

Image 5.2: Battery life and recharge capabilities.
6. Maintenance and Care
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.
- Ensure charging contacts on both earbuds and case are clean and free of debris.
Water Resistance (IPX7)
The earbuds are IPX7 waterproof, meaning they can withstand immersion in water up to 1 meter for 30 minutes. This makes them suitable for rainy outdoor sports and sweating during workouts. However, the charging case is not waterproof. Do not immerse the charging case in water.

Image 6.1: IPX7 waterproof rating of the earbuds.
Storage
Store the earbuds in their charging case when not in use to protect them and keep them charged. Avoid extreme temperatures and direct sunlight.
7. Troubleshooting
Earbuds Not Pairing
- Ensure both earbuds are charged.
- Turn off Bluetooth on your device, then turn it back on.
- Forget the "F9" device in your device's Bluetooth settings and try pairing again.
- Place earbuds back in the case, close the lid, wait a few seconds, then open to re-initiate pairing mode.
Only One Earbud Working
- Ensure both earbuds are charged.
- Try placing both earbuds back into the charging case, close the lid, and then take them out again to allow them to re-sync with each other.
- If the issue persists, try resetting the earbuds (refer to specific reset instructions if available in a full manual, or try forgetting the device and re-pairing).
Charging Case Not Charging
- Check the USB-C cable and power adapter for damage.
- Ensure the cable is securely connected to both the case and the power source.
- Try a different USB-C cable or power adapter.
Poor Sound Quality
- Ensure earbuds are properly seated in your ears. Try different sized ear tips.
- Clean the earbud mesh to remove any wax or debris.
- Ensure your device is within the Bluetooth range (up to 33 feet/10 meters) and there are no significant obstructions.
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | F9 |
| Bluetooth Version | 5.3 |
| Bluetooth Range | 33 Feet (10 meters) |
| Charging Case Battery Capacity | 2000mAh |
| Earbud Battery Life (Single Charge) | Approx. 5 hours music, 6 hours talk time |
| Total Battery Life (with Case) | Over 24 hours |
| Charging Time | Approx. 30 minutes (earbuds) |
| Water Resistance Level | IPX7 (Earbuds only) |
| Noise Control | Active Noise Cancellation, Passive Noise Cancellation, Sound Isolation (CVC 8.0) |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 26 Millimeters |
| Sensitivity | 103 dB |
| Impedance | 25.94 Ohms |
| Control Method | Touch |
| Compatible Devices | Android, iOS, Mac, Windows, Nubia Red Magic 5G |
| Earbud Dimensions | Approx. 0.9 x 0.5 inches |
| Case Dimensions | Approx. 2.7 x 1.3 x 1.2 inches |
| Item Weight | 4 Ounces (total) |

Image 8.1: Physical dimensions of the earbuds and charging case.
9. Warranty Information
VOLT PLUS TECH products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty from the date of purchase. Please retain your proof of purchase for warranty claims. The warranty covers manufacturing defects but does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
10. Customer Support
If you encounter any issues or have questions regarding your VOLT PLUS TECH F9 Wireless Bluetooth Earbuds, please contact our customer support team. Refer to the contact information provided on the product packaging or our official website for assistance.





