This device is a portable digital gauge for measuring paint thickness (Paint Thickness Tester), and is commonly used to inspect car paint to ensure there is no bodywork, putty, or repainting. Here are the most prominent specifications and features of the device: Measurement range: from 0.0 to 2.0 mm (or from 0 to 80 mil). Resolution: 0.1 mm or 1 mil. Measurement units: Supports conversion between two units: mm and mil via the bottom UNIT button. Display: A small digital LCD screen clearly displays readings and the unit used. Working principle: It relies on magnetic induction to measure the thickness of non-metallic paint on metal surfaces (such as iron, steel, or aluminum) in a non-destructive way for the paint. Control buttons: TEST: To turn on the device, start the inspection process, or zero the previous reading. UNIT button: To change the measurement unit. Operation and power: It runs on a small CR2032 3-volt button battery (or equivalent) and features an automatic shut-off after a short period of inactivity to save power. Design: It is characterized by its light weight and very small size for easy portability and has a hand strap to prevent it from falling during inspection.