While the headset is OFF , press and hold the ON/OFF key for 8 seconds . Place it back in the charging case to complete the reset cycle. Technical Specifications Bluetooth Version: 5.1 + EDR

Never leave batteries unattended. The YYK525 has safety timers, but you are the primary safety device.

Never use the automatic "Check for Updates" button. The public OTA server delivers a throttled, feature-limited version of the firmware. As part of this , here is how to sideload the performance firmware.

: Single click to accept or terminate a call. Reject Call : Double click to decline an incoming call.

Approximately 1.5 hours for both headset and case