The Sino Single Axis DRO Units with Optical Linear Glass Scale and One Axis Digital Readout DRO comes with a half centerline calculation along with tool-error compensation. It also features a memory backup functionality for the added ease of use. The console has a sleep mode, which saves power while the scale is not in use. The advanced calculator has trigonometric functions, which add convenience while you work. This readout kit also includes a KA-300 optical linear glass scale that features a maximum measuring speed of 60m/min. you can choose from the available models between 100mm and 1020mm measuring travel lengths.