Hi can somepne explain what the numbers around the edge of the glass are on the above Garmin please, its lit up to 15 but never moves the numbers go around to 160
They are second markers, like you might see on a traditional watch. If you use an analog watch face the second hand will point to them as it counts and some of the digital watch faces use a second counter around the edge as well. The stopwatch and timer also use them in a similar way.