STARRETT'S 799 SERIES ELECTRONIC CALIPERS ARE LIGHT COMFORTABLE EASY-TO-USE AND CONSTRUCTED WITH FEATUES THAT HAVE MADE STARRETT SLIDE CALIPERS THE MACHINIST'S FIRST CHOICE FOR MANY YEARS. THE 799 OFFERS A SLIM STREAMLINED PROFILE A LARGE CLEAR EASY-TO-READ LCD DISPLAY LONG BATTERY LIFE AND FUNCTION BUTTONS FOR ZERO AND INCH/MM. THIS MODEL IS AVAILABLE IN 0-6"" MEASURING RANGE. ROLLING THUMB WHEEL CONTROL BUTTONS ON FACE ZERO ON/OFF AND INCH/MM. LIGHTWEIGHT ERGONOMIC DESIGN. LAST MEASURING POSITION RETAINED WHEN SHUT OFF. LARGE EASY-TO-READ HIGH-CONTRAST LCD DIGITAL READOUT. LOCK SCREW. ONE 3-VOLT BATTERY INCLUDED FOR EXTENDED USAGE. ZERO AT ANY POSITION. AUTOMATIC OFF. FINE ADJUSTMENT THUMB WHEEL. INTEGRATED DEPTH ROD. HARDENED STAINLESS STEEL BODY.