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A: Yes. The precision voltage reference (VREF) is constantly heated to 45°C to maintain thermal stability. This is a sign of a high-quality unit, not a defect.

: Find out how to clean the device safely. This might include which cleaning agents to use and which areas to avoid. yyk525 user manual exclusive

: A full recharge for both the headset and the case takes about 1.5 hours via a USB-C cable. A: Yes

Save this guide. Share it discreetly. And the next time someone complains about Error E-42 or a silent failure, you’ll know exactly what the manual doesn’t say. yyk525 user manual exclusive

: Remove the earbuds from the charging case and peel off any protective film.