1. Product Overview
The Boytond Bluetooth Single Wireless Headset, Model YYK-520, is designed for hands-free communication and audio playback. It features Bluetooth 5.3 technology for stable connections, a comfortable in-ear design with a rotatable ear hook, and a portable charging case for extended battery life. This manual provides instructions for setup, operation, and maintenance.

Image: The Boytond Bluetooth Single Wireless Headset, its charging case, and three sizes of silicone eartips.
2. Package Contents
Before use, please verify that all items are present in the package:
- Boytond Bluetooth Single Wireless Headset (YYK-520)
- Wireless Charging Case
- USB-C Charging Cable
- Multiple sizes of Eartips (S, M, L)
- User Manual

Image: An exploded view of the product packaging, showing the headset, charging case, USB-C cable, and eartips.
3. Setup
3.1 Charging the Headset and Case
The headset and charging case are powered by built-in lithium polymer batteries. Ensure both are fully charged before initial use.
- Connect the provided USB-C charging cable to the charging port on the case.
- Connect the other end of the cable to a compatible USB power source (e.g., wall adapter, computer USB port).
- The LED display on the charging case will indicate the battery level. A full charge for the case takes approximately 1.5 hours.
- Place the headset into the charging case. The headset will charge automatically.
A fully charged headset can provide approximately 14.5 hours of battery life. The charging case can provide 5-6 additional charges for the headset, extending total usage time to about 80 hours.

Image: The headset charging in its case via a USB-C cable, displaying battery capacity (500mAh) and standby time (120 hours).
3.2 Pairing with a Device
The headset uses Bluetooth 5.3 for a stable and quick connection.
- Ensure the headset is charged and powered on.
- Activate Bluetooth on your smartphone, tablet, or other compatible device.
- Search for available Bluetooth devices.
- Select "YYK-520" (or similar name) from the list of devices.
- Once connected, the headset will indicate successful pairing (e.g., a voice prompt or LED indicator change).
The headset can maintain a stable connection up to 10 meters indoors and 15 meters on flat ground.

Image: The Boytond headset demonstrating quick Bluetooth 5.2 connection to various devices including computers, laptops, tablets, and phones, with indicated indoor and outdoor range.
3.3 Wearing the Headset
The headset is designed for comfortable wear in either the left or right ear.
- Select the appropriate eartip size (S, M, L) for a secure and comfortable fit.
- The ear hook can be rotated 180° vertically and 360° horizontally to adjust to your ear shape and preferred wearing style.
- Gently place the eartip into your ear canal and position the ear hook over your ear.

Image: A man wearing the Boytond headset, illustrating the rotatable ear hook (270° and 360°) and different eartip sizes (S, M, L) for comfortable ergonomic design.
4. Operating Instructions
4.1 Basic Controls
The headset features physical buttons for easy operation:
- Power On/Off: Press and hold the multi-function button.
- Play/Pause Music: Single press the multi-function button.
- Next Track: Press and hold the volume up button.
- Previous Track: Press and hold the volume down button.
- Volume Up/Down: Short press the volume up/down buttons.
4.2 Call Management
- Answer/End Call: Single press the multi-function button.
- Reject Call: Press and hold the multi-function button.
- Redial Last Number: Double-press the multi-function button.
- Mute Function: Specific button or combination (refer to detailed manual for exact control).
4.3 Voice Assistant (SIRI)
Activate your device's voice assistant (e.g., Siri) by pressing a designated button (refer to detailed manual for exact control).
4.4 Connecting Two Devices Simultaneously
The headset supports connecting to two devices at the same time, allowing you to manage calls and audio from different sources without re-pairing.
- Pair the headset with the first device as described in Section 3.2.
- Disconnect Bluetooth on the first device.
- Pair the headset with the second device.
- Reconnect Bluetooth on the first device. The headset should now be connected to both devices.
4.5 Noise Reduction
The headset incorporates CVC 8.0 noise reduction technology to minimize background noise during calls, ensuring clearer communication.

Image: A man wearing the Boytond headset, with a graphic illustrating CVC 8.0 Noise Cancellation, showing a 'Before' and 'After' comparison of sound waves to demonstrate noise reduction.
4.6 Usage Scenarios
The headset is suitable for various environments:
- Office: For hands-free calls and virtual meetings.
- Driving: To safely manage calls while on the road.
- Leisure: For listening to audio or making calls during personal time.

Image: Three panels depicting individuals using the Boytond headset in different settings: an office worker, a driver, and someone enjoying leisure time.
5. Maintenance
5.1 Cleaning
- Wipe the headset and charging case with a soft, dry cloth.
- Do not use harsh chemicals or abrasive materials.
- Regularly clean the eartips and charging contacts to ensure optimal performance.
5.2 Water Resistance
The headset is waterproof. However, it is not designed for submersion. Avoid prolonged exposure to water or use during heavy rain.
5.3 Storage
When not in use, store the headset in its charging case in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter issues with your Boytond Bluetooth Headset, refer to the following common solutions:
- No Power: Ensure the headset and charging case are fully charged.
- Cannot Pair:
- Ensure Bluetooth is enabled on your device.
- Make sure the headset is in pairing mode (usually indicated by a flashing LED).
- Move the headset closer to your device.
- Forget the device from your phone's Bluetooth settings and try pairing again.
- No Sound/Low Volume:
- Adjust the volume on both the headset and your connected device.
- Ensure the headset is properly connected to your device.
- Check for obstructions in the eartip.
- Intermittent Connection/Sound:
- Ensure there are no significant obstacles between the headset and your device.
- Move away from other wireless devices that may cause interference.
- Re-pair the headset with your device.
- Charging Issues:
- Verify the USB-C cable is securely connected to both the case and the power source.
- Try a different USB-C cable or power adapter.
- Clean the charging contacts on the headset and inside the case.
If the issue persists after trying these steps, please contact customer support.
7. Specifications
| Model Name | 520-1 |
| Item Model Number | YYK-520 |
| Brand | Boytond |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.3 |
| Wireless Communication Technology | Bluetooth |
| Ear Placement | In Ear |
| Form Factor | In Ear |
| Earpiece Shape | Rounded Tip with Ear Hook |
| Control Type | Button Control |
| Water Resistance Level | Waterproof |
| Charging Time | 1.5 Hours (for case) |
| Battery Life | 14.5 Hours (headset), 80 Hours (with charging case) |
| Included Components | Wireless Charging Case |
| Compatible Devices | Android/iOS devices |
| Item Weight | 0.11 Kilograms (3.84 ounces) |
| Material | Plastic |
8. Warranty and Support
8.1 Warranty Information
Specific warranty details for the Boytond Bluetooth Single Wireless Headset (Model YYK-520) are not provided in the product information. Please refer to the warranty card included in your product packaging or contact Boytond customer support for detailed warranty terms and conditions.
8.2 Customer Support
For further assistance, technical support, or inquiries regarding your Boytond product, please contact the manufacturer directly. Contact information can typically be found on the product packaging, the official Boytond website, or through your retailer.






