1. Easy to use. 2. 2.0mm max range. 3. 2units mm/mil. 4. Car paint surface measurement value is 0.1mm, not to paint, normal value is about 0.1 to 0.3. 5. Measured value is 1 mm, explain here to paint. 6. This tester is designed to not-destructively measure the thickness of non-magnetic coatings(including paint, enamel, plastic, epoxy, etc)on iron, steel or aluminum.