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. Drawer battery compartment design, more convenient to replace batteries. 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. Specification : Measuring Range: 0-200mm Accuracy: ±0.08 Resolution: 0.01mm Readout Diameter: Approx. 5.5cm / 2.2inch Readout Thickness: Approx. 1.7cm / 0.7inch Ruler Size: Approx. 33.5*4.2*1.8cm/13.2*1.7*0.7inch 29.3*4.2*1.7CM Battery: 2pcs * 3V CR2032 button cells (NOT included) Weight: Approx. 308g / 10.9oz Package List: 1 x Digital Readout Kit (batteries are NOT included) 1 set x Mounting Accessories .