press and hold upper right and lower left buttons at the same time for about 1 sec to lock the keys...same works for unlockingIs it possible to lock the buttons on the Fenix 1? In a span of two weeks, I also bought the Fenix 3 but had to return it. I just can't get used to the size - its too wide for me. I'm sticking with the first gen.
EDIT: Ha - ok so I read the manual and found out ;-)