Introduction
Thank you for choosing the YYK520 Wireless Headset. This ear-mounted Bluetooth V5.1 headset is designed for business and personal use, offering hands-free calling with advanced noise reduction technology. It features an ergonomic design for comfortable wear, professional sound quality, and a convenient charging case. This manual provides detailed instructions to help you get the most out of your device.

Package Contents
Please check the package for the following items:
- 1 x YYK520 Wireless Headset
- 1 x Charging Case (optional, depending on purchase)
- 2 x Ear Caps (various sizes)
- 1 x Charging Cable (Type-C)
- 1 x User Manual
Specifications
| Feature | Specification |
|---|---|
| Bluetooth Version | V5.1+EDR |
| Wireless Frequency | 2.4GHZ |
| Supported Protocols | A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 |
| Transmission Distance | 10 meters |
| Headset Battery Capacity | 100mAh |
| Play/Talk Time | Approx. 8 hours |
| Headset Charging Time | Approx. 1 hour |
| Standby Time | 120 hours |
| Speaker Impedance | φ8MM 32Ω |
| Microphone Sensitivity | -42Db |
| Working Temperature | -10 to 50℃ |
| Charging Case Input | 5V/1A |
| Charging Case Battery Capacity | 500mAh |
| Material | ABS, Plastic |
| Waterproof Rating | IPX7 Life Grade (sweat and rain resistant) |
| Features | Hands-free Call, Noise Reduction, Voice Assistant, Volume Control |
Product Overview
The YYK520 headset is designed for comfort and functionality. Familiarize yourself with its components and controls:

- Ergonomic Earhook: Designed for extended comfort and to fit a wide range of ear shapes.
- Rotatable Shafts: Two rotatable alloy shafts allow for arbitrary adjustment of the wearing angle, fitting both left and right ears.
- Microphone: Integrated for clear voice capture during calls.

- Type-C Port: For charging the headset.
- Multi-function Button: Used for Play/Pause, Answer/Hang up calls, and activating Voice Assistant (e.g., Siri).
- Volume Buttons (+/-): Adjust volume. Long press for Next Song (Volume +) or Last Song (Volume -).
- Microphone On/Off: Toggle microphone during calls.
- Third Party Call Handover: Manage multiple calls.
Setup
1. Charging the Headset and Charging Case
Before first use, fully charge the headset and its charging case.
- Headset: Place the headset into the charging case. Connect the Type-C charging cable to the charging case and a 5V/1A power adapter. The headset will charge automatically. A full charge takes approximately 1 hour.
- Charging Case: Connect the Type-C charging cable to the charging case and a 5V/1A power adapter. The digital display on the charging case will indicate the battery level. A full charge takes approximately 1-2 hours.

2. Bluetooth Pairing
- Power On: Take the headset out of the charging case, or long-press the multi-function button until you hear a power-on prompt and the indicator light flashes.
- Activate Bluetooth: On your smartphone or other Bluetooth-enabled device, go to the Bluetooth settings and turn on Bluetooth.
- Search for Device: Look for 'YYK520' in the list of available devices.
- Connect: Select 'YYK520' to pair. Once connected, you will hear a confirmation tone, and the indicator light will stop flashing or show a steady light.
- Reconnect: The headset will automatically reconnect to the last paired device when powered on and within range.
Operating Instructions
Wearing the Headset
Adjust the ear hook and rotate the headset for a comfortable and secure fit on either your left or right ear. The extendable earhook accommodates various ear shapes.

Call Functions
- Answer/End Call: Short press the multi-function button.
- Reject Call: Long press the multi-function button.
- Microphone On/Off: During a call, short press the dedicated microphone button to mute/unmute.
- Third Party Call Handover: Refer to your phone's specific instructions for managing multiple calls with a Bluetooth headset.
Music Playback
- Play/Pause: Short press the multi-function button.
- Next Song: Long press the 'Volume +' button.
- Previous Song: Long press the 'Volume -' button.
- Volume Up/Down: Short press the 'Volume +' or 'Volume -' button.
Voice Assistant
- Activate Voice Assistant (Siri, Google Assistant, etc.): Short press the multi-function button twice.
Maintenance
- Cleaning: Regularly wipe the headset and charging case with a soft, dry, lint-free cloth. Do not use abrasive cleaners or solvents.
- Ear Caps: Remove and clean the ear caps periodically with mild soap and water, then ensure they are completely dry before reattaching.
- Water Resistance: The headset has an IPX7 life grade waterproof rating, making it resistant to sweat and rain. However, avoid submerging it in water or exposing it to strong jets of water. Dry thoroughly if it gets wet.
- Storage: When not in use, store the headset in its charging case to protect it from dust and damage, and to keep it charged.
- Temperature: Avoid storing or using the headset in extreme temperatures (-10℃ to 50℃ is the recommended operating range).
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Headset does not power on | Ensure the headset is charged. Place it in the charging case or connect directly to a power source. |
| Cannot pair with device | Make sure the headset is in pairing mode (indicator light flashing). Turn off and on Bluetooth on your device. Ensure the headset is within 10 meters of your device. Forget the device in your Bluetooth settings and try pairing again. |
| No sound or low volume | Check the volume level on both the headset and your connected device. Ensure the headset is properly connected. Try playing different audio sources. |
| Charging case not charging | Check if the Type-C cable is securely connected to both the case and the power adapter. Try a different charging cable or power adapter. |
| Call quality is poor | Ensure the microphone is not muted. Move closer to your connected device. Avoid environments with strong electromagnetic interference. Utilize the built-in call noise reduction feature. |
User Tips
- Comfortable Fit: Take time to adjust the rotatable ear hook to find the most comfortable and secure fit for your ear. This will enhance both sound quality and long-term wearability.
- Regular Cleaning: Keep the ear caps and headset clean to maintain hygiene and prevent sound degradation.
- Optimize Call Clarity: In noisy environments, the built-in call noise reduction is highly effective. Ensure the microphone is positioned correctly for best results.
- Battery Management: For optimal battery life, store the headset in its charging case when not in use. This keeps it protected and ready for your next use.
Warranty and Support
For warranty information, technical support, or any issues not covered in this manual, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.



