Easy keyboard control Balanced frame design Smooth friction thimble for uniform pressure Automatic off after 30 minutes non-use Measurement hold button Micro-lapped carbide measuring faces Ability to retain and return to the true zero reading Zero tool at any position No-glare finish Hard, stable 1-piece spindle Instant inch/millimeter conversion Large, high-contrast LCD digital readout Ring-type knurled lock nut Standard inch graduations on shell and thimble RS232C output jack.Restricted States:AK,HI,PR