I have a Gtech-pro RR used like three times. It still has the plastic on the meter screen. I never used the Pass software to record laps or 1/4 mile passes. Its been sitting in my closet for like a year.This is Gtech's website To help answer any questions about it.

G-Tech Pro "RR" (Road Racer) Performance Meter

Accurate to within 1/100 of a second which is achieved using 3 precision accelerometers and full temperature compensation. Records up to 30 runs plus features PASS-Performance Analysis System Software. Its PC downloadable. Easy to install: Just mount it on the windshield, plug into your cigarette lighter & go!

Measures the following:
-Horsepower
-Torque
-60ft, 1/8 mile, and 1/4 mile
-RPM's & Shift Points
-Braking Distances
-Handling G's
-Also has built in shift light

Includes serial cable, 12v cigarette cable, ac power adapter, owner's manual & software.

This unit retails for $289.95. I would like $175.00 picked up or shipped to US and if you want it to go to anywhere else I'd have to find out how much.

 

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Was it pretty accurate. I just want to know cause I ordered one.

 

It was pretty close. Its hard theres so many factors that can screw it up. It really has to be a perfect run for it to be correct. i was really surprised on how acurate the tach could be be to the cars.