Yyk525 User Manual Exclusive -
The indicator light will turn off once the connection is established. Key Controls Answer/End Call: Press the MFB once. Reject Call: Press and hold the MFB for 2 seconds.
The headset uses a Multi-Function Button (MFB) and volume switches to manage calls and media without touching your phone: Control Command Click the Switch button once Refuse Call Double-click the Switch button Pause/Play Music Click the Switch button Next/Previous Track Long press Volume+ or Volume- for 1 second Activate Voice Assistant (Siri) Press and hold the Switch button for 2 seconds Mute Microphone Press and hold the dedicated Mute button Reset Headset While off, press and hold the ON/OFF key for 8 seconds Hardware Specifications yyk525 user manual exclusive
| Code | Display Text | Meaning | Exclusive Fix | | :--- | :--- | :--- | :--- | | | Input Over-Voltage | Input > 28V | Get a regulated 24V supply. | | E-07 | Reverse Polarity | Battery cables swapped | The YYK525 has MOSFET protection; simply reverse the leads. No damage. | | E-12 | Thermal Throttle | Internal temp > 70°C | Improve airflow. The fan curve is linear; it spins up at 65°C. | | E-24 | Ground Loop Detected | USB data ground conflict | Use an isolated USB hub. This is exclusive to the Pro variant. | | E-88 | EEPROM Corrupt | Settings lost | Enter Factory Reset via the hidden menu: Power off, then Power on + Triple-tap FN. | The indicator light will turn off once the
