1Mainly used for measuring and positioning the assembly fixed on the fixture in the process of processing or machine tool assembly. 2Equipped with a mini LCD display, with inches, decimals, and metric display for clear readings. 3The digital display ruler is easy to operate, set the zero point at any position within the working range and determine the relative distance. 4Using high-quality aluminum alloy and plastic materials, after fine processing, the measurement data is accurate. 5The sensor is equipped with a transmission port, which can be connected to a data line to complete remote measurement and simplify the operation. Item Type: Digital Display Ruler Material: Plastic/aluminum alloy Range: Approx. 0-300mm / 0-11.8in Accuracy: 0.01 Battery Model: CR2032 (not included) Battery Voltage: 3V Type: Fixed Other Function: Remote data transmission (transmission port attached to the sensor) Application: Suitable for lathes, milling machines, router tables, planers, table saw fences and other machine tools. Use it to equip and upgrade old lathes and various industrial lathes. How to Use: Load the battery or chain to connect the power supply to use, turn on the power, press the ZERO button to reset to zero, and the mm/in button to change the display unit. 1 x Digital Display Ruler 1 x Battery Compartment Cover