LOCK: Lock or un-lock the target speed from the target window to the lock window.
HOLD: Hold or un-hold the transmitting of microwave.
MV/ST: Switching between moving and stationary mode.
LANE: Selecting target from opposite or same lane in the moving mode.
FRONT/REAR: Switching between the front antenna and the rear antenna (for the moving radar).
FAST/SLOW: Select or de-select the fastest mode in the moving and opposite lane mode, or in the the stationary mode; Select or de-select the slower target mode in the moving and same lane mode.
P.BLANK: Blanking the displayed patrol speed, or de-blanking the patrol speed display.
SP LMT -: Reduce the speed limit threshold for the the autolocking function.
SP LMT +: Increase the speed limit threshold for the the autolocking function.
ZOOM IN: Zoom in the video camera.
ZOOM OUT: Zoom out the video camera.
