... :TTL,EIA-422-A 2:Resolution:0.1,0.5,1,5,10 um 3:ISO9001:2008,CE, ... ) 200 auxiliary zero:2)gamma calculator (for milling machine);3)Power-down memory:4)non-linear error compensation ... EDM)2)Slash punch (for milling machine)3)Tool compensation function (for milling machine);4)Taper measurement function (for lathe ... RS-232 communication (ordered separately) Ditron 2 aixs digital readout for milling machine