Suunto Memory Belt User Manual page 13

MEMORY LOW/FULL
If the memory is low, a signal of 2 long beeps and 2 long, orange flashes are repeated 3
times. This is followed by a flash every 4 seconds, which indicates that you should download
your data to your PC and empty the belt's memory. However, as the memory is low, not full,
Suunto Memory Belt will continue recording normally.
2 long, red
2 long
battery too low to operate,
switching to sleep mode
2 long, orange, then 1 every
4 seconds
2 long
memory low, still recording
heart rate
11