Yyk525 User Manual Exclusive __full__ «UHD»

Activate pairing mode by turning on the headset; the indicator light will flash red and blue alternately. Open your device's Bluetooth settings and select If prompted for a password, enter Multifunction Key (MFB) Controls Answer/Hang Up Call : Click the switch button once. Refuse Call : Double-click the switch button. Voice Assistant (Siri/Google) : Long-press the on button for 1 second. Mute Microphone : Press and hold during a call. : Press and hold during a call. Music Play/Pause : Click the switch button once. Charging Instructions Hilitand YYK-525 Wireless Business Headset User Manual

| 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 YYK-525 is a single-ear Bluetooth 5.1 headset designed for professional business use, driving, and hands-free communication. It features a rotating ear hook (270–360 degrees) to fit either the left or right ear. Quick Setup & Pairing yyk525 user manual exclusive

: The charging case features a digital display that shows the current battery percentage. Maintenance and Safety

Navigate to your smartphone's system settings menu and open the . Activate pairing mode by turning on the headset;

Place the headset into the charging bin to initiate automatic recharging. Power On/Off

The YYK525 restarts endlessly, showing a white screen for 3 seconds, then black. Exclusive Fix: The standard manual says "contact support." Instead, perform the Capacitive Discharge : Voice Assistant (Siri/Google) : Long-press the on button

All lights work, but no data output. Exclusive Fix: The UART port has entered a "latching state." Bridge the TX and RX pins on the auxiliary port for exactly 2 seconds using a paperclip. This resets the handshake protocol.

To operate the YYK525 device, follow these step-by-step instructions:

Approximately 1.5 hours for both headset and case