1. Introduction
Thank you for choosing the Voistek BC3-Pro Bone Conduction Headphones. These open-ear headphones are designed for active lifestyles, featuring IP68 waterproofing, Bluetooth v5.3 connectivity, and a built-in 32GB MP3 player. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and longevity of your device.

Image 1.1: Overview of Voistek Bone Conduction Headphones highlighting key features like IP68 Waterproofing, 32GB Memory, Bluetooth 5.3, Magnetic Suction Charging, Lightweight design, and CVC Microphone Noise Reduction.
2. Product Overview
2.1 Package Contents
- Voistek BC3-Pro Bone Conduction Headphones
- Magnetic Charging Cable
- Adjustable Elastic Band
- User Manual
2.2 Key Features
- Bone Conduction Technology: Delivers audio through your cheekbones, keeping your ears open to ambient sounds for enhanced safety.
- IP68 Waterproof Rating: Fully submersible, suitable for swimming and other water activities.
- Bluetooth v5.3: Stable and efficient wireless connection to compatible devices.
- Built-in 32GB MP3 Player: Store up to 8000 songs for offline listening, ideal for swimming or phone-free workouts.
- Long Battery Life: Up to 8 hours of music and calls on a single charge.
- Magnetic Fast Charging: Quick and convenient charging.
- Lightweight Titanium Frame: Durable and comfortable for extended wear.
- Adjustable Fit: Includes an elastic band for a secure fit during intense activities.
3. Setup
3.1 Charging the Headphones
Before first use, fully charge your headphones. Connect the magnetic charging cable to the charging port on the headphones and plug the USB end into a power adapter (not included) or a computer's USB port. The LED indicator will show charging status.
- Charging Time: Approximately 1.5 hours for a full charge.
- Battery Life: Up to 8 hours of playback.

Image 3.1: Illustration of the headphones' battery endurance, showing 8 hours of battery life, 72 hours standby, and quick charge capability.
3.2 Power On/Off
- Power On: Press and hold the Power button for 3 seconds until the LED indicator flashes.
- Power Off: Press and hold the Power button for 5 seconds until the LED indicator turns off.
3.3 Bluetooth Pairing
- Ensure the headphones are powered off.
- Press and hold the Power button for 5-7 seconds until the LED indicator flashes red and blue alternately, indicating pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "BC3 Pro" from the list of devices.
- Once connected, the LED indicator will flash blue slowly.
3.4 MP3 Mode (Offline Playback)
The headphones feature a built-in 32GB MP3 player for music playback without a connected device. To transfer music, connect the headphones to a computer using the magnetic charging cable. The headphones will appear as a removable drive, allowing you to drag and drop audio files.

Image 3.2: Depiction of the internal memory and Bluetooth chip, highlighting the 32GB storage for unrestricted music anytime.
4. Operating Instructions
4.1 Wearing the Headphones
Place the headphones with the transducers resting on your cheekbones, just in front of your ears. The band should wrap around the back of your head. For a more secure fit during intense activities, use the included adjustable elastic band.

Image 4.1: The adjustable elastic band helps achieve a better and more secure fit, reducing slipping during activities.
4.2 Controls
The headphones feature multi-function buttons for easy control:
- Power/Multi-function Button: Power on/off, play/pause music, answer/end calls.
- Volume Up (+): Increase volume, next track (long press).
- Volume Down (-): Decrease volume, previous track (long press).
4.3 Switching Between Bluetooth and MP3 Modes
Quickly double-tap the Multi-function button to switch between Bluetooth mode and MP3 player mode.
4.4 Music Playback
- Play/Pause: Single press the Multi-function button.
- Next Track: Long press the Volume Up (+) button.
- Previous Track: Long press the Volume Down (-) button.
4.5 Call Management
- Answer/End Call: Single press the Multi-function button.
- Reject Call: Long press the Multi-function button.
4.6 Voice Assistant
Triple-tap the Multi-function button to activate your device's voice assistant (e.g., Siri, Google Assistant).
4.7 Usage Scenarios
The open-ear design allows you to remain aware of your surroundings, making these headphones suitable for various activities:
- Running & Cycling: Hear traffic and other environmental sounds for safety.
- Swimming: Utilize the IP68 waterproof rating and MP3 mode for underwater listening. Note: Bluetooth mode is unavailable during swimming; please switch to MP3 mode.
- Workouts & Gym: Enjoy music without ear discomfort.
- Hiking & Outdoor Activities: Stay connected to nature while listening to audio.






4.8 Product Video
Video 4.8: This video demonstrates the setup, wearing, and various usage scenarios of the Voistek BC3-Pro Bone Conduction Headphones, including Bluetooth pairing, sports activities like basketball and tennis, and swimming.
5. Maintenance
5.1 Cleaning
After use, especially after swimming or heavy sweating, rinse the headphones with fresh water and wipe them dry with a soft cloth. Do not use harsh chemicals or abrasive materials for cleaning.
5.2 Storage
Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures. Avoid placing heavy objects on them. When not in use, ensure they are fully charged to prolong battery life.
5.3 Water Resistance
The IP68 rating ensures protection against dust and continuous immersion in water up to 1.5 meters for 30 minutes. However, for swimming, it is recommended to use MP3 mode as Bluetooth signals do not transmit effectively underwater.
6. Troubleshooting
- No Power: Ensure the headphones are fully charged. If the issue persists, try a different charging cable or power source.
- Cannot Pair via Bluetooth:
- Ensure the headphones are in pairing mode (LED flashing red and blue).
- Turn off and on Bluetooth on your device.
- Clear previous Bluetooth connections on your device and try pairing again.
- Ensure the headphones are within the Bluetooth range (typically 10 meters).
- No Sound:
- Check the volume level on both the headphones and your connected device.
- Ensure the headphones are correctly paired and connected.
- If in MP3 mode, ensure music files are properly loaded onto the 32GB storage.
- Poor Sound Quality: Ensure the transducers are positioned correctly on your cheekbones. Adjust the fit using the elastic band if necessary.
- Cannot Transfer MP3 Files: Ensure the headphones are connected to your computer and recognized as a removable drive. Try a different USB port or cable.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | BC3-Pro |
| Connectivity Technology | Wireless (Bluetooth v5.3) |
| Water Resistance Level | IP68 |
| Built-in Storage | 32GB (MP3 Player) |
| Battery Life | Up to 8 Hours |
| Charging Time | Approximately 1.5 Hours |
| Material | Titanium |
| Item Weight | 150 Grams |
| Control Method | Push Button |
| Ear Placement | Over Ear (Bone Conduction) |
| Form Factor | Open Ear |
| Impedance | 23 Ohms |
8. Safety Information
- Do not attempt to disassemble or modify the headphones.
- Keep the headphones away from extreme temperatures, humidity, and corrosive substances.
- Avoid listening at excessively high volumes for prolonged periods to prevent hearing damage.
- When using the headphones in traffic or other potentially hazardous environments, always prioritize your safety and awareness of surroundings.
- Ensure the charging port is dry before connecting the magnetic charging cable to prevent damage.
9. Warranty and Support
Voistek products come with a manufacturer's warranty. For specific warranty details, product support, or service inquiries, please refer to the warranty card included in your package or visit the official Voistek website. Please retain your proof of purchase for warranty claims.