Transystem 747Pro - Manual (Page 7)

7
1.6 Power Switch and Push Button
Power Switch
Right (Off)
Power off
Middle (NAV) Navigation is enabled.
Left (LOG) Both Navigation & LOG are enabled.
Push button
Push
Push button to record POI (Points of Interest),
LED will blink 3 times which means the POI is recorded.
Difference between NAV and LOG:
NAV Working as a Bluetooth GPS receiver.
LOG Both of navigation and logging functions are enabled.