digital readout meter 1, power off Memory 2multi-role catalogue 3,liner error compensation 4,axis:1,2,3 digital readout and scale1:zero ... have a good capacity of resisting disturbance,durable keyboard,easy to change5,the catalogue is multi-role .6,automatic tool compensation ... 4.Pull out the connect of the linear scale. 5. Change the safe pipeThe hull of the digital readout has electrification1.check ...