Metrix Plus Coat Scope - 1.5 V Coating Thickness Gauge consists of a three-coil system that detects the magnetic field. The magnetic field is detected by the central coil, after which the details of the coating are measured. In the absence of the magnetic field, the 1.5 V Coating Thickness Gauge produces a net voltage between two coils to measure the paint coating's thickness. Thickness Gauge displays the measurements through the LCD panel, which mentions four digits of the sizes. To support measurement in the absence of light, there is a backlight provided. Product Specifications- Brand- Metrix Plus Weight- 145 grams Display- 4 digits LCD, Backlight Dimensions- 145 x 65 x 25 mm Model- Coat Measurer F+ N Power- 2 x 1.5 v AAA Battery