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Name Options Description TKRS 21 TKRS 31
Fast FPM 50 / 100 / 200 /
500 / 1000 /
2000 / 5000
Select the rate of FPM
change when the fast
adjustment mode is used.
Display
brightness
20% / 40% / 60% /
80% / 100%
Select the display
brightness.
Auto off off / 5 min /
10 min
Select if the stroboscope
should turn off
automatically and after how
many minutes.
Pro mode on / off Toggle between the
standard and “pro”
operating modes.
Bluetooth on / off Turn the Bluetooth module
on and off.
Memory go to Access the memory to
store and load actual speed
measurements.
Factory
settings
restore Restore the device to
factory settings and clear
the memory.