: Usually involves long-pressing the Set or Clock button until the digits flash, then using the Next/Previous buttons to adjust hours and minutes.
For a device like the Yayusi S2, which may ship with a minimal “quick start guide” in broken English, the full PDF manual (if available) typically includes detailed specifications, button functions, LED indicator meanings, and safety warnings. Yayusi S2 Manual Pdf
Before you start your next project, verify that you have the latest revision of the . : Usually involves long-pressing the Set or Clock