Features:     This digital readout kit can be installed on a variety of woodworking and metalworking machines allowing conversion to digital readout.       Remote readout LCD display convenient for reading and operation.       The design is novel and has strong anti-interference ability.       Quick response speed of 3 m/s, no over-speed error occurred.       The display has a magnet on the back, which can be attached to iron and is more convenient to use.       It is used to be equipped together with various industry lathes and upgrade old lathe.         Specifications:  Measuring Range: 0-300mm Accuracy: ±0.10  Overall Length: 43.8cm/17.2in Battery: 2 * 3V CR2032 button cells(NOT included)  Weight: 354g        Buttons:  ON/OFF: Power switch button    ABS: Relative measurement and absolute measurement conversion  mm/in: millimeter and inch standard conversion  ZERO: Data reset(zeroing) at any position  SET:  In the imperial standard measurement state, each time the button is pressed, the resolution of the fraction part is switched between 1/32,1/64,1/128.  Package Includes:  1 x Digital Readout Kit(batteries are NOT included)  1 set x Mounting Accessories