SOLAR DIGITAL CALIPER High quality digital measuring device, made of carbon fiber composite, with a variety of functions and LCD display. Zeroing possible in any position of the jaws, thus allowing different measurements. Internal diameter and depth measurement function. Adjustable measurement in mm or inches. The carbon fiber composite material guarantees precise measurement and at the same time preservation of coins or any other object to be measured. The measuring device is ready for use at any time thanks to the two energy sources. When the degree of brightness is above 200 LUX, the LCD display is supplied with electricity by the solar cell. Below 200 LUX degree of luminosity, a 3 Volt battery takes over for the power supply of the LCD display. Technical data: Measuring capacity: 0 – 150 mm, 6“ Accuracy: +/- 0.2mm, +/- 0.01“ Numerical step value: 0.1 mm, 0.01“ NOT USED IN MECHANICAL DE PRECISION