1. Product Overview
The VIVO B39 Wireless Bluetooth Headphones offer a versatile audio experience with features like Bluetooth 5.1 connectivity, active noise cancellation, HiFi stereo sound, and a built-in microphone. Designed for comfort and durability, they are suitable for various uses including gaming, sports, and general listening.

Figure 1: VIVO B39 Headphones with key features: Bluetooth/TF Card/Wired connectivity, toggleable lights, and rich heavy bass.
Video 1: Demonstration of the VIVO B39 headphones' LED lights and various color options.
2. Package Contents
Please check the package for the following items:
- VIVO B39 Wireless Bluetooth Headphones
- User Manual
- Charging Cable (Type-C)
3. Setup and Connection
3.1 Charging the Headphones
Before first use, fully charge the headphones. The battery capacity is 600mAh, providing up to 12 hours of battery life. A full charge typically takes 2 hours.
- Locate the Type-C charging port on the headphones.
- Connect the provided charging cable to the headphones and a compatible USB power source (e.g., computer, wall adapter).
- The indicator light will show charging status (e.g., red while charging, off or blue when fully charged).

Figure 2: Headphones highlighting 600mAh battery capacity and 8 hours duration for continuous listening.
3.2 Power On/Off
- Power On: Press and hold the power button for approximately 3 seconds until the indicator light turns on.
- Power Off: Press and hold the power button for approximately 3-5 seconds until the indicator light turns off.
3.3 Bluetooth Pairing
The headphones use Bluetooth 5.1 for stable and fast connections.
- Ensure the headphones are powered off.
- Press and hold the power button for about 5-7 seconds until the indicator light flashes rapidly (usually blue and red, indicating pairing mode).
- Enable Bluetooth on your device (smartphone, tablet, computer).
- Search for available Bluetooth devices and select "VIVO B39" from the list.
- Once successfully paired, the indicator light will typically turn solid blue or flash slowly.

Figure 3: Illustration of the Bluetooth 5.1 chip, indicating high transmission speed and improved performance.
3.4 TF Card Music Playback
The headphones support TF (MicroSD) cards from 128MB to 16GB.
- Insert a TF card with your desired music files into the TF card slot on the headphones.
- The headphones will automatically switch to TF card playback mode.
- Use the control buttons to play, pause, and skip tracks.

Figure 4: Headphones illustrating the TF card slot and 3.5mm audio jack for versatile playback options.
3.5 Wired Connection
For devices without Bluetooth or when the headphone battery is low, you can use the 3.5mm audio cable.
- Connect one end of the 3.5mm audio cable to the audio jack on the headphones.
- Connect the other end to the 3.5mm audio output of your device.
- The headphones will function as wired headphones.

Figure 5: Headphones demonstrating the seamless switching between wired and wireless modes.
4. Operating Instructions
4.1 Volume and Track Control
- Volume Up: Press the "+" button.
- Volume Down: Press the "-" button.
- Next Track: Long press the "+" button.
- Previous Track: Long press the "-" button.
- Play/Pause: Press the multi-function button (often the power button or a dedicated play/pause button).
4.2 Call Management
The headphones feature a built-in microphone and CVC Noise Suppression Technology for clear communication.
- Answer/End Call: Press the multi-function button.
- Reject Call: Press and hold the multi-function button for 2 seconds.

Figure 6: CVC Noise Suppression Technology helps focus on music and calls without interruptions.
4.3 Active Noise Cancellation (ANC)
The VIVO B39 headphones feature active noise cancellation to reduce ambient noise. Locate the ANC button (if dedicated) or refer to the multi-function button for activation/deactivation. This feature helps you immerse yourself in your audio.

Figure 7: Intelligent noise reduction helps reject noisy environments, making treble clearer and reducing distortion.
4.4 LED Breathing Light
The headphones feature colorful cool breathing lights. Use the designated button (if available) or a combination of control buttons to toggle or change the light effects.

Figure 8: White headphones showcasing the colorful cool breathing light feature, along with HiFi sound effects and ultra-clear call quality.
5. Maintenance and Care
- Cleaning: Wipe the headphones with a soft, dry cloth. Avoid using abrasive cleaners or solvents. Do not submerge in water.
- Storage: When not in use, fold the headphones for compact storage. Store them in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the headphones frequently. Charge them regularly, even if not in constant use.
- Durability: The headphones are constructed with tough and excellent ABS material for comfortable and durable wear.

Figure 9: The foldable design of the headphones for easy storage and portability.

Figure 10: Illustration of the headband's tensile endurance and breathable earmuffs for long-term comfort.
6. Troubleshooting
- Headphones won't power on: Ensure the battery is charged. Connect the charging cable and try again after a few minutes.
- Cannot pair with device: Make sure the headphones are in pairing mode (indicator light flashing rapidly). Turn off and on your device's Bluetooth. Ensure the headphones are within the maximum wireless range (<10m).
- No sound or low volume: Check the volume levels on both the headphones and your connected device. Ensure the headphones are properly connected via Bluetooth or the 3.5mm audio cable.
- Poor sound quality: Move closer to your connected device to reduce interference. Ensure there are no physical obstructions between the headphones and the device.
- Microphone not working: Ensure the microphone is not obstructed. Check your device's audio input settings to confirm the headphones' microphone is selected.
7. Specifications
| Attribute | Value |
|---|---|
| Brand Name | VIVO |
| Model | B39 |
| Material | ABS |
| Weight | 150g |
| Battery Capacity | 600mAh |
| Battery Life (up to) | 12 hours |
| Standby Duration | 800 hours |
| Charging Time | 2 hours |
| Bluetooth Version | 5.1 |
| Maximum Wireless Range | <10m |
| Communication | Wireless |
| Connectors | Type-C (charging), 3.5mm Audio Jack (wired) |
| With Microphone | Yes |
| Active Noise-Cancellation | Yes |
| Sound Isolating | Yes |
| Volume Control | Yes |
| Control Button | Yes |
| Earcups Type | Semi-open |
| Number Of Drivers | 2 |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 50dB |
| Impedance Range | up to 32 Ω |
| Resistance | 32 Ω |
| Support Memory Card | Yes (TF Card 128M-16G) |
| Waterproof | No |
| Voice assistant built-in | No |
| Support APP | No |
| Certification | CE |
| Package Dimensions (L x W x H) | 13cm x 9cm x 19cm |
| Package Weight | 0.252 kg |
8. User Tips
- Optimal Comfort: Adjust the headband length to ensure a comfortable fit. The soft earmuffs are designed for long listening sessions without discomfort.
- Versatile Playback: Take advantage of the multiple connection options: Bluetooth for wireless freedom, TF card for direct music playback, and the 3.5mm audio cable for universal compatibility or when the battery is low.
- Enhanced Audio: Utilize the active noise cancellation feature in noisy environments to fully enjoy the HiFi stereo sound and rich heavy bass.
- Stylish Design: Experiment with the colorful cool breathing lights to personalize your headphone experience.
- Portability: The foldable design makes these headphones easy to carry and store, perfect for travel or commuting.

Figure 11: Multi-device support for Android, Notebook, Tablet, and iPhone, making the headphones highly versatile.
9. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or retailer from whom you purchased the VIVO B39 headphones. Please retain your proof of purchase for warranty purposes.





