Resolution .0002"/0.005mm. Buttons: on/off, hold, inch/mm, s (select jaws), zeroMeasure radius of internal or external arcs.Display can be rotated by 320ºSupplied with 5 jaws for different sizes of arc. Battery CR2032
. Automatic power off.
Resolution .0005"/0.01mmMeasure radius of external arc, arc angle of measured surface should be larger than 60°Display radius value, no need to calcuateButton function: on/off, zero, data preset,...