1. Introduction
Thank you for choosing the sayrelances X7 Pro Bone Conduction Swimming Headphones. These headphones are designed to provide a unique audio experience through bone conduction technology, making them ideal for various sports activities, including swimming, running, cycling, and surfing. Featuring IPX8 waterproofing, 32GB of internal memory for MP3 playback, and Bluetooth 5.4 connectivity, the X7 Pro offers versatility and high-quality sound in diverse environments.
Please read this manual carefully to ensure proper use, maintenance, and to fully enjoy the features of your new headphones.
2. What's in the Box
Upon unpacking, please verify that all the following items are included:
- sayrelances X7 Pro Bone Conduction Swimming Headphones
- Charging Cable (Magnetic)
- Storage Pouch
- Adjustment Strap
- One pair of Earplugs

Image: The sayrelances X7 Pro headphones, magnetic charging cable, storage pouch, adjustment strap, and earplugs.
3. Product Overview
The sayrelances X7 Pro features an ergonomic, open-ear design for comfort and situational awareness. Key components include the bone conduction transducers, control buttons, and a magnetic charging port.

Image: Detailed diagram showing the control buttons on the sayrelances X7 Pro headphones, including volume, power, and mode switch.
Control Button Functions:
- Power Button (On/Off / Play/Pause / Call Management / Mode Switch):
- Power On/Off: Press and hold for 3-5 seconds.
- Play/Pause: Single click.
- Answer/End Call: Single click during an incoming call or active call.
- Reject Call: Press and hold for 2 seconds during an incoming call.
- Bluetooth/MP3 Mode Switch: Double click.
- Volume Up (+) Button:
- Increase Volume: Single click.
- Next Song: Press and hold for 2 seconds.
- Volume Down (-) Button:
- Decrease Volume: Single click.
- Previous Song: Press and hold for 2 seconds.
4. Setup
4.1 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 source (e.g., computer USB port, wall adapter). The LED indicator will show charging status. A full charge provides up to 8 hours of battery life.

Image: The sayrelances X7 Pro headphones connected to their magnetic charging cable, illustrating the charging process.
4.2 Transferring MP3 Files (32GB Internal Memory)
The X7 Pro features 32GB of internal memory, allowing you to store up to 9000 songs or audiobooks for offline playback, especially useful for swimming where Bluetooth is not available.
- Connect the headphones to your computer using the magnetic charging cable.
- Your computer will recognize the headphones as a removable disk.
- Drag and drop your desired MP3 audio files into the headphone's storage folder.
- Safely eject the headphones from your computer once the transfer is complete.

Image: The sayrelances X7 Pro headphones connected to a laptop, demonstrating the process of transferring MP3 files to the internal 32GB memory.
4.3 Bluetooth Pairing
The X7 Pro uses Bluetooth 5.4 for stable wireless connection with your devices (iOS, Android, Windows).
- Ensure the headphones are powered on and in Bluetooth mode (double-click the Power button if in MP3 mode). The LED indicator will flash, indicating pairing mode.
- On your device, go to Bluetooth settings and search for available devices.
- Select "X7 Pro" from the list to pair.
- Once paired, the LED indicator will stop flashing and remain solid.
Note: Bluetooth mode is not available underwater. Please switch to MP3 mode for swimming.

Image: The sayrelances X7 Pro headphones shown with a laptop, illustrating Bluetooth 5.4 compatibility with iOS, Android, and Windows operating systems.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press and hold the Power button for 3-5 seconds until the LED indicator lights up.
- Power Off: Press and hold the Power button for 3-5 seconds until the LED indicator turns off.
5.2 Switching Between Bluetooth and MP3 Modes
Double-click the Power button to switch between Bluetooth mode and MP3 mode. The headphones will indicate the current mode.
Important: Always switch to MP3 mode when using the headphones for swimming or any underwater activity, as Bluetooth signals do not transmit effectively through water.

Image: A split image illustrating the use of MP3 mode for underwater activities like swimming and Bluetooth mode for land-based sports such as running.
5.3 Music Playback
- Play/Pause: Single click the Power button.
- Next Song: Press and hold the Volume Up (+) button for 2 seconds.
- Previous Song: Press and hold the Volume Down (-) button for 2 seconds.
- Increase Volume: Single click the Volume Up (+) button.
- Decrease Volume: Single click the Volume Down (-) button.
- MP3 Playback Order: In MP3 mode, triple-click the Power button to switch between sequential playback and random playback.
5.4 Call Management (Bluetooth Mode Only)
- Answer/End Call: Single click the Power button.
- Reject Call: Press and hold the Power button for 2 seconds.
5.5 Usage in Water
The X7 Pro headphones are IPX8 waterproof, designed for submersion. For optimal performance and to prevent signal loss, always switch to MP3 mode before entering water. The open-ear design allows for comfortable use with swimming caps and goggles.

Image: The sayrelances X7 Pro headphones shown in use by a swimmer, highlighting their waterproof design for aquatic activities.
6. Maintenance
6.1 Cleaning
- After each use, especially after swimming, rinse the headphones with fresh water to remove chlorine or salt residue.
- Wipe the headphones dry with a soft, clean cloth.
- Do not use abrasive cleaners or solvents, as these can damage the device.
6.2 Storage
- Store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures.
- Use the provided storage pouch to protect the headphones from dust and scratches when not in use.
6.3 Battery Care
- To prolong battery life, avoid fully discharging the headphones frequently.
- If storing for an extended period, charge the headphones to about 50% every few months.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Low battery | Charge the headphones fully. |
| Cannot pair via Bluetooth | Headphones not in pairing mode; device Bluetooth off; too far from device | Ensure headphones are in Bluetooth pairing mode (flashing LED). Turn on device Bluetooth. Move closer to the device (within 10 meters). |
| No sound in water | Still in Bluetooth mode | Switch to MP3 mode (double-click Power button) before entering water. Bluetooth does not work underwater. |
| MP3 files not playing correctly | Incorrect file format; corrupted files; incorrect playback order | Ensure files are in MP3 format. Re-transfer files. Triple-click Power button to change playback order (sequential/random). |
| Poor sound quality | Volume too low/high; headphones not positioned correctly; environmental noise | Adjust volume. Ensure transducers rest on cheekbones. Intelligent noise cancellation is active, but extreme noise may still affect quality. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | X7 Pro |
| Brand | sayrelances |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Bluetooth Range | Up to 10 meters |
| Water Resistance Level | IPX8 (Waterproof) |
| Internal Memory | 32GB (for MP3 playback) |
| Battery Life | Up to 8 hours |
| Control Method | Push Button |
| Audio Driver Type | Bone Conduction Driver |
| Frequency Range | 20 Hz to 20,000 Hz |
| Noise Control | Active Noise Cancellation |
| Compatible Devices | Phones, activity monitors, other Bluetooth 5.4 compatible devices (iOS, Android, Windows) |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Weight | 170 g |
| Recommended Uses | Cycling, Running, Swimming, Surfing, Fitness |
9. Warranty & Support
sayrelances offers a 2-year after-sales service for your X7 Pro Bone Conduction Swimming Headphones. If you encounter any issues or have questions regarding your product, please do not hesitate to contact our customer support team.
For support, please refer to the contact information provided with your purchase or visit the official sayrelances website.