I believe it receives data for aceleration from four different directions: forward, backward, left and right. It will display g-forces for all these vectors.
The model that I purchased can not be downloaded to a PC. The next model up (FX-2) has this capability. This website can give you a picture of the unit and it's specifications:
http://www.beltronics.com/fx.html
Neither model has a shift light. That would be a nice feature.