A star deduction is only because they did not come with instructions. While it is not really much to explain, but I had to try, as the background is changed to black but duration. After 2 minutes, it was clear:
A long press on the button switches between flashing and continuous operation.
A short press in persistent mode then changes color.
Also I would like to read in a manual which types of batteries are required in case of a change.
According to information in the fossil shop make the change but a flat rate for 10 euros; whether the fossil now requires 1 or 3 batteries. ALL batteries be replaced. I hope that's true even if the time comes.