1. Introduction
Welcome to the Sanag B21S Bone Conduction Earphones user manual. These wireless earbuds utilize advanced bone conduction technology to deliver high-fidelity audio while keeping your ears open to ambient sounds, ensuring safety and comfort during various activities. Designed for sports enthusiasts, they feature Bluetooth 5.4 connectivity, powerful bass, and IPX5 waterproof rating.
Key features include:
- Lossless, Powerful Bass with Freq Extreme and SSQVP Extreme technology.
- 360° Non-perforated Design for sound leakage prevention.
- Up to 10 hours of strong endurance on a single charge.
- Lightweight and unobtrusive fit, ideal for extended wear.
- Durable Memory Alloy Frame for flexibility and secure fit.
- Sports Grade Sealed Waterproof (IPX5) for protection against sweat and splashes.
2. Getting Started
2.1 Package Contents
Please check the package for the following items:
- Sanag B21S Bone Conduction Earphones
- Charging Cable (Type-C)
- User Manual (this document)
2.2 Charging the Earphones
Before first use, fully charge your earphones. The B21S features a Type-C charging interface.
- Connect the provided Type-C charging cable to the charging port on the earphones.
- Connect the other end of the cable to a compatible USB power source (e.g., computer USB port, wall adapter).
- A full charge takes approximately 1.2 hours.
- The earphones offer up to 10 hours of playtime and 7 days of standby time on a full charge.
Note: Battery life data comes from Sanag laboratories. Actual usage may vary based on music format and playback volume.
2.3 Bluetooth Pairing
To connect your Sanag B21S earphones to your device:
- Ensure the earphones are charged and powered off.
- Press and hold the power button until the indicator light flashes, indicating pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Sanag B21S" from the list of found devices.
- Once connected, the indicator light will change, and you will hear a confirmation sound.
- The earphones use Bluetooth 5.4 for a stable connection up to 10 meters.
3. Operation
3.1 Wearing the Earphones
The Sanag B21S earphones are designed for a comfortable and secure fit, especially during physical activity.
- Place the earphones over your ears with the transducers resting on your cheekbones, just in front of your ears.
- The memory alloy frame allows for 360° arbitrary bending, ensuring a snug fit that can be adjusted to your head shape and will return to its original form.
- The lightweight and unobtrusive design, combined with a triangular stable structure, provides comfort for long wear without pain and improved motion stability.
- The design is also convenient for glasses wearers, subtly avoiding conflict with spectacle frames.
3.2 Controls
The earphones feature physical buttons for easy control of playback and calls.
- Power Button: Press and hold to power on/off. Short press for play/pause, answer/end calls.
- Volume Up (+): Increase volume.
- Volume Down (-): Decrease volume.
3.3 Audio Features
The B21S earphones deliver a rich audio experience through bone conduction technology.
- Bone Conduction Principle: Sound is transmitted through high frequency and low density vibration via your bones, offering a safer and healthier listening experience compared to traditional in-ear headphones. This design ensures "real bones don't leak sound" and allows you to remain aware of your surroundings.
- Lossless Bass: Equipped with a high-resolution moving iron and high-frequency oscillator enhancement technology, the earphones provide powerful, lossless bass and rich musical performance.
- Enhanced Surround Sound: Optimized three-dimensional surround sound for movement, presenting an exciting sense of rhythm and stimulating movement potential.
- Wind Noise Reduction: The Shuangmai technology resists wind noise, accurately picks up speech, filters noise interference, and greatly reduces ambient sound, ensuring clear communication even in windy conditions.
3.4 Sanag APP
Enhance your experience by connecting your earphones to the Sanag APP. The app allows you to explore more possibilities, including:
- 6 EQ sound adjustments
- Digital enhancement mode
- Battery status display (Show SOC)
- Sanag AI features
4. Maintenance
4.1 Cleaning
- Wipe the earphones with a soft, dry, or slightly damp cloth.
- Do not use abrasive cleaners, solvents, or strong chemicals.
- Ensure the charging port is dry before charging.
4.2 Waterproofing (IPX5)
The Sanag B21S earphones are IPX5 rated, meaning they are protected against low-pressure water jets from any direction. This makes them suitable for:
- Protection against sweat during intense workouts.
- Resistance to rain and splashes.
- Use during running, surfing, splashing, and hiking.
Important: IPX5 rating does NOT mean the earphones are suitable for swimming or submersion in water.
4.3 Storage
- Store the earphones in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid storing with sharp objects that could damage the frame or components.
5. Troubleshooting
If you encounter issues with your Sanag B21S earphones, try the following steps:
- No Power: Ensure the earphones are fully charged. Connect to a power source and check the charging indicator.
- Cannot Pair:
- Ensure Bluetooth is enabled on your device.
- Make sure the earphones are in pairing mode (indicator light flashing).
- Move the earphones closer to your device.
- Turn off and on the earphones and your device's Bluetooth.
- Forget the device from your phone's Bluetooth settings and try pairing again.
- No Sound:
- Check the volume levels on both the earphones and your connected device.
- Ensure the earphones are properly connected via Bluetooth.
- Try playing audio from a different application or source.
- Poor Sound Quality:
- Ensure the earphones are positioned correctly on your cheekbones.
- Check for any obstructions between the earphones and your device.
- Move away from sources of strong electromagnetic interference.
6. Specifications
The following table details the technical specifications for the Sanag B21 Bone Conduction Wireless Headset:
| Feature | Specification |
|---|---|
| Model Name | Sanag B21 (Bone Conduction Wireless Headset) |
| Wireless Version | BT 5.4 |
| Connection Range | ≥10m |
| Audio Coding | SBC, AAC |
| Frequency Response | 20Hz-20KHz |
| Charging Voltage | 5V |
| Battery Capacity | 155mAh |
| Loudspeaker | 8ohm*13mm |
| Charging Interface | Type-C |
| Material | Plastic |
| Battery Life (Playtime) | Up to 10 hours |
| With Microphone | Yes |
| Is Wireless | Yes |
| Support APP | Yes |
| Waterproof Rating | IPX5 |
| Volume Control | Yes |
| Control Button | Yes |
| Vocalism Principle | Bone Conduction |
| Wireless Type | Bluetooth |
| Connectors | Type-C |
| Communication | Wireless |
| Style | Bone conduction headphones |
| Origin | Mainland China |
| NFC Technology | No |
| Sound Isolating | No |
| Active Noise-Cancellation | No |
7. User Tips
- For optimal sound quality and comfort, ensure the transducers are placed firmly on your cheekbones. Experiment with slight adjustments to find the sweet spot.
- The open-ear design is excellent for outdoor activities where situational awareness is crucial. Enjoy your music while staying safe.
- Utilize the Sanag APP to customize your audio experience with EQ adjustments and other features.
- Remember that while IPX5 waterproof, these earphones are not designed for swimming or full submersion. Wipe them dry after sweaty workouts.
- The flexible memory alloy frame is durable, but avoid excessive twisting or sharp bends to prolong its lifespan.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Sanag website or contact your retailer. Keep your proof of purchase for any warranty claims.
