Ball GMT Limited Edition 4 in 1 V2

Double Tap 6 to Unlock Tap Functions / Single Tap to Lock tap functions.

Center to Zoom.

3 to adjust Brightness.

Tap between 4 and 5 to advance GMT hand 30 min.

Tap between 6 amd 7 to reduce GMT hand 30 min.

9 to toggle Dim - Auto / On / Off.

12 to toggle Faces.

Second Hand Battery Reserve in Dim.