M2 AAD User Manual page 23

6. Control
If the m is switched into UP-mode or DOWN-mode, the entered preset altitude will show, otherwise, it will read zero.
2
Remaining battery in % (2 digits = 0 to 99%);
If the battery shows just 1%, as an example, do not worry, the battery still has enough reserve and you can use the device all day.
100% will be displayed only upon the first time the m2 is switched on by the manufacturer. If a flashing „b" appears instead of arrows
when switching on for calibration and the battery status is 0%, do not use the device!!!
Device serial number (6 digits = XXXXXX);
Device configuration and firmware version (6 digits = VUFFFF);
V = version
"1" - EXPERT
"2" - STUDENT
"3" - TANDEM
"4" - SPEED
U = units
"A" – device calibrated in meters
"F" – device calibrated in feet
FFFF = firmware version
Year and month of manufacture (6 digits = YYYYMM; Y = year, M = month);
GRAVITY index of the last jump (3 digits = 0–99.9%);
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