How Can I use the CarMD handheld tester by itself?
The CarMD tool itself can be used on an unlimited amount of vehicles to get a clean bill of health, provided the vehicle in test is a 1996 or newer car, light truck, SUV or minivan. The handheld tester features patented, color-coded LEDs to let you quick check any vehicle. Just plug in the tool to get the peace of mind that a green LED can give you.