What do you want to use it on? If it's your D1 then a simpler ScanGauge would be all the diagnostic power you need. If it's for your LR3 it sounds like a better application. Assuming the latter, have you considered the Black Box Solutions NanoCom? The LR3 version of that costs about half of the Atlantic British scanner. Not sure what the differences are, the AB website doesn't give much info on the capabilities of this Tek Pro scanner.