1. Introduction
Thank you for choosing the Sanag B33S Bone Conduction Headphones. These headphones are designed to provide a high-quality audio experience for various activities, including swimming, running, and other sports, with advanced waterproofing and integrated MP3 storage.

Figure 1: Sanag B33S Bone Conduction Headphones.
2. Key Features
- IPX8 Swimming Waterproof: Fully sealed, designed for immersion up to 2 meters.
- Bone Conduction Panoramic Sound: Enhances low-frequency vibration, suitable for underwater audio.
- High Definition Call Noise Reduction: Geer high-definition microphone filters environmental noise for clear calls.
- 32GB MP3 Storage: Store thousands of songs for phone-free music playback.
- Flash Link 6.0 Bluetooth: Faster and more stable wireless connections.
- Long Battery Life: Up to 8 hours playtime on a 2-hour charge, 30 days standby.
- Lightweight & Comfortable: Golden triangle earwing wrap-around design for a secure fit.

Figure 2: Internal view highlighting the Flash Link 6.0 chip.
3. Package Contents
Ensure all items are present in your package:
- Sanag B33S Bone Conduction Headphones
- USB Charging Cable
- User Manual
4. Setup and First Use
4.1 Charging the Headphones
- Locate the magnetic charging port on the headphones.
- Connect the provided USB charging cable to the magnetic port.
- Plug the USB-A end of the cable into a compatible USB power adapter (not included) or computer USB port.
- The indicator light will show charging status. A full charge takes approximately 2 hours.
Video 1: Demonstrates connecting the magnetic charging cable to the headphones.
4.2 Powering On/Off and Bluetooth Pairing
- Power On: Press and hold the power button (center button on the control panel) for 3 seconds until the indicator light flashes.
- Bluetooth Pairing: When powered on for the first time or entering pairing mode, the indicator light will blink, indicating it's ready to pair.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "Sanag B33S" in the list of available devices and select it to connect.
- Once connected, the indicator light will stop blinking and remain solid.
- Power Off: Press and hold the power button for 3 seconds until the indicator light turns off.
Video 2: Demonstrates the power and volume controls, and how to wear the headphones.
5. Operating Instructions
5.1 Music Playback
- Play/Pause: Double-click the '+' button.
- Volume Up: Press the '+' button once.
- Volume Down: Press the '-' button once.
- Next Track: Hold down the '+' button.
- Previous Track: Hold down the '-' button.
5.2 Call Management
- Answer/End Call: Click the '+' button once.
- Reject Call: Hold down the '+' button for 2 seconds.
5.3 Switching Between Bluetooth and MP3 Modes
The Sanag B33S headphones feature both Bluetooth and 32GB internal MP3 storage. Switch modes as needed:
- To switch between Bluetooth and MP3 modes, refer to the specific instructions in your quick start guide or the device's control panel.
- Note: Bluetooth signals cannot be transmitted underwater. Use MP3 mode for swimming.

Figure 3: Using the headphones in swimming mode.
6. Maintenance and Care
- After use, especially after swimming or heavy sweating, gently wipe the headphones dry with a soft cloth.
- Avoid exposing the headphones to extreme temperatures.
- Do not attempt to disassemble or modify the headphones, as this will void the warranty.
- Store in a cool, dry place when not in use.
7. Troubleshooting
| Problem | Solution |
|---|---|
| Cannot power on | Ensure the headphones are fully charged. Press and hold the power button for 3-5 seconds. |
| Cannot pair via Bluetooth | Ensure the headphones are in pairing mode (blinking indicator light). Check your device's Bluetooth settings and try reconnecting. Make sure the headphones are not connected to another device. |
| No sound or low volume | Adjust the volume on both the headphones and your connected device. Ensure the headphones are properly positioned on your cheekbones. |
| Music cuts out underwater | Bluetooth signals do not transmit well underwater. Switch to MP3 mode for underwater listening. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | B33S |
| Brand | Sanag |
| Connectivity Technology | Wireless (Bluetooth 6.0) |
| Water Resistance Level | IPX8 Waterproof |
| Internal Memory | 32GB (MP3 Storage) |
| Battery Life | Up to 8 Hours |
| Charging Time | 2 Hours |
| Standby Time | 30 Days |
| Audio Driver Type | Bone Conduction Driver |
| Item Weight | 21 Grams (0.741 ounces) |
| Product Dimensions | 5.2 x 4.72 x 1.85 inches |
9. Warranty and Support
For warranty information and customer support, please refer to the official Sanag website or contact your retailer. Keep your purchase receipt for warranty claims.





