1. Product Overview
The VAORLO S9 is a versatile 2-in-1 bone conduction wireless headphone designed for various activities, including swimming, cycling, and running. It features both open-ear and in-ear wearing styles, IPX8 swimming-grade waterproofing, Bluetooth 5.4 connectivity, and a built-in 32GB MP3 player for offline music listening.

Figure 1: VAORLO S9 Bone Conduction Headphones
Video 1: VAORLO S9 Product Overview, demonstrating wearing styles and key features.
2. Package Contents
Ensure all items are present in your package:
- 1x S9 True Bone Conduction Wireless Headphones
- 1x Magnetic Charging Cable
- 1x In-ear Silicone Cap
- 1x User Manual
- 1x Retail Package
3. Setup Instructions
3.1 Initial Charging
Before first use, fully charge your S9 headphones. Use the provided magnetic charging cable and a 5V/1A or 5V/2A charging adapter. Do not use fast chargers, as this can damage the battery.
- Connect the magnetic charging cable to the charging port on the headphones.
- Connect the USB end of the cable to a compatible power adapter or computer USB port.
- The LED indicator on the headphones will show charging status (refer to the LED indicator section in Operating Instructions for details).
- Charging time is approximately 2.5 hours for a full charge.

Figure 2: Magnetic charging port for the S9 headphones.
3.2 Bluetooth Pairing
To connect your S9 headphones to a Bluetooth device (e.g., smartphone, tablet):
- Ensure the headphones are powered off.
- Press and hold the Power On/Off button for 3 seconds to turn on the headphones.
- If connecting for the first time, the headphones will automatically enter pairing mode (prompt tone: "Bluetooth is connected").
- On your device, enable Bluetooth and search for "S9" in the list of available devices.
- Select "S9" to connect. Once connected, you will hear a confirmation tone.
Connecting to Two Devices Simultaneously:
The S9 headphones support dual connection. To connect to two devices:
- Successfully connect the S9 headphones to the first mobile phone.
- Disconnect the S9 from the first mobile phone's Bluetooth settings.
- Turn on the Bluetooth function of the second mobile phone, search for "S9", and connect.
- After the second connection is successful, reconnect the first mobile phone to the S9 headphones. Both devices should now be connected.

Figure 3: S9 headphones supporting multi-device connection.
3.3 MP3 Music Mode (Downloading Music)
The S9 headphones have a built-in 32GB memory for offline music playback. To download music:
- Connect the headphones to your computer using the complimentary data cable.
- The "S9 U-Disk" should automatically appear. If not, manually navigate to "My Computer" and open the "S9 U-Disk".
- Open any music software on your computer, search for the desired songs, and download them.
- Locate the downloaded MP3 format song files.
- Drag and drop the MP3 files into the "S9 U-Disk" folder.

Figure 4: S9 headphones with 32GB built-in memory for offline music.
4. Operating Instructions
4.1 Button Functions
The S9 headphones feature humanized physical buttons for easy control:

Figure 5: Detailed button layout and functions.
- "I" Key (Transparent Button):
- Single click: Switch between "In-Ear (Swimming)" and "Open-Ear" Mode.
- Double click: Switch between Single Loop / Random Play / Sequential Play (only valid in "MP3 Music Mode").
- "-" Key:
- Single Click: Volume Down.
- Long Press: Previous Song.
- Triple Click: Switch between Chinese and English Prompt Tones.
- "+" Key:
- Single Click: Volume Up.
- Long Press: Next Song.
- "-" Key (Bottom Power Button):
- Long Press: Power On / Power Off / Reject Call.
- Single Click: Play / Pause / Answer Call / Hang Up.
- Double click: Switch between "Bluetooth Mode" and "MP3 Music Mode".
- Triple Click: Activate AI Voice Control.
4.2 Wearing Styles
The S9 headphones offer two wearing styles:
- Open-Ear Mode: Ideal for outdoor activities like running or cycling, allowing you to stay aware of your surroundings.
- In-Ear Mode (with silicone caps): Suitable for underwater activities like swimming or indoor running, providing enhanced sound isolation and waterproofing.

Figure 6: Swimmer demonstrating both in-ear and on-water bone conduction modes.

Figure 7: Runner wearing headphones in open-ear mode for exercise.
5. Maintenance
5.1 Water Usage Precautions
- The S9 headphones are IPX8 waterproof, suitable for swimming pools up to 20 meters deep.
- Do NOT use in seawater. Seawater is corrosive to electronic products, especially the magnetic charging part, which can lead to corrosion, charging failure, or power issues.
- When swimming or using underwater, ensure the headphones are in "MP3 Music Mode" for optimal performance, as Bluetooth signals are absorbed by water.
5.2 Charging and Storage
- Always use a 5V/1A or 5V/2A charging adapter. Avoid fast chargers.
- After each use, especially after exercise or water exposure, wipe off any water or sweat from the surface of the headphones, paying close attention to the magnetic charging contacts to prevent corrosion.
- If not used for an extended period, fully charge the headphones at least once a month to maintain battery health.
6. Troubleshooting
- No Bluetooth Connection Underwater: This is normal. Bluetooth communicates via electromagnetic waves, which are absorbed by water. Switch to "MP3 Music Mode" for underwater listening.
- Charging Issues: Ensure the magnetic charging contacts are clean and dry. Use a compatible 5V/1A or 5V/2A charger. If corrosion is suspected due to seawater exposure, contact support.
- Headphones Not Turning On: Ensure the headphones are sufficiently charged. If fully charged and still not turning on, try resetting by holding the power button for an extended period (e.g., 10-15 seconds) or contact support.
- Sound Quality Issues: Ensure the headphones are properly positioned. For bone conduction, the transducers should rest on your cheekbones. For in-ear mode, ensure the silicone caps are correctly inserted.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | VAORLO |
| Model | S9 |
| Material | ABS, Silica Gel |
| Bluetooth Version | V5.4 |
| Memory | Built-in 32GB |
| MP3 Music Format | MP3, WAV |
| Waterproof Grade | IPX8 (20 meters depth) |
| Speaker Impedance | 8Ω±3db |
| Microphone Sensitivity | 42±2db |
| Headphone Weight | 26±2g |
| Battery Capacity | 180mAh |
| Battery Life (Music Time) | About 8H (at 60% Volume) |
| Charging Time | About 2.5H |
| Current Input | 5V/100-500mA |
| Charging Method | Magnetic Charging |
| Maximum Wireless Range | 10m-20m (Bluetooth Mode) |
| Features | Waterproof, With microphone, Apple Siri Support, Active Noise Cancelling, Dual Connection, Voice assistant built-in, Sound Isolating, Volume Control, Control Button, HIFI Lossless Sound Quality, DT9.0 Directional Sound Transmission, 360° Panoramic Surround, Two-Way Acoustic Noise Cancellation Technology, SF-EARS Secure Fit Technology |
8. User Tips
- Optimal Sound: Experiment with both open-ear and in-ear modes to find the best sound experience for your activity. The in-ear caps are particularly useful for swimming to enhance sound clarity underwater.
- Secure Fit: The memory wire ear-hooks are designed for comfort and a secure fit. Adjust the angle of the earphone heads for personalized comfort, especially during high-intensity sports.
- Offline Music for Water Sports: Always use the built-in 32GB MP3 player when swimming or in water to avoid Bluetooth connectivity issues.
- Regular Cleaning: After any water exposure or heavy sweating, gently wipe down the headphones, especially the charging contacts, to prevent long-term damage.
9. Warranty and Support
Your VAORLO S9 headphones come with a user manual included in the package. For any technical assistance, warranty claims, or further inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt for warranty purposes.