Extra large lcd display for easy reading of up to 6"/150mm precision measurements of lengths, caliber, depth, diameter, circular and cylindrical objects; remove protective film on screen prior to use Designed for accurate measuring to 0.02 mm/0.001" and 0.01 mm/0.0005" resolution; extra smooth sliding, robustly built with high finish stainless steel to IP54 splash and dust resistant rating Quick unit conversion between metric mm/inch/fractional inch by repeatedly pressing the mm/in/F button; zero button designed for easy resetting; automatic power off after 5 minutes of inactivity Convenient battery replacement by simply pulling open the battery compartment with metal pin supplied to replace the 3V CR2032 battery, no need to fiddle with screwdrivers; spare battery provided Great present packed in sturdy case, digital calipers 6 inch / electronic caliper / digital calipers measuring tool / measuring caliper for jewelers, woodworkers, machinists, DIYers, automotive mechanics