"G-TECH is designed to make a professional test driver out of anybody. All you have to do is plug it in a cigarette lighter, mount it to the windshield and start accelerating. G-TECH/Pro does the rest automatically and displays the results. It's a great way to get performance and safety information about you car."

"All the measurements are performed automatically. All you have to do is push the button indicating to G-TECH/Pro that you are ready and then G-TECH/Pro will zero-out and display -GO-. Then simply start accelerating. G-TECH/Pro will know your speed and distance at any given moment and stop the measurement at 60 MPH or 1/4 mile point."

Measures:

- 0 to 60 MPH time
- 1/4 mile elapsed time (E.T.)
- 1/4 mile trap speed
- Instantaneous lateral acceleration (G s)
- Sustained lateral acceleration (G s)
- 60 MPH braking distance
- Instantaneous braking Gs
- Sustained braking Gs
- Horsepower

got info on the net. dont have instructions, but i downloaded the manual from the gtech website.barely used.....good for tuning/when your adding new parts or getting your driving skills downpacked. ....asking $40...PM ME IF INTRESTED.