GRBL CNC Offline 3 Axis Control Controller Board for 3018 Pro 1610/2418/3018 engraving machine carving milling machineFunction:1: manual control: manually adjust the position of the three XYZ axes as the starting point of engraving, and manually turn the spindle on or off.2: document engraving: after the offline board is saved in the file, it can be connected to the GRBL control board for engraving, no need, to get to the computer.3: storage file: the offline version is connected to the computer and recognized as a USB storage device that can directly access the engraving file.4. Chinese and English dual system, long press Z+ on the home page to switch between Chinese and English. The new high-speed 1.8-inch Grbl offline controller connecting Grbl motherboards allows you to engrave files offline. Read 600 files at a time. You can connect a USB computer to transfer files to this controller. Compatible with all versions of Grbl.The bitrate is adjustable. Press Z+ for 5 seconds: Change the language to English. Press Z+ and Z-: the Z axis will move up and down. Press X+ and X-: The X-axis will move left and right. Press Y+ and Y-: the Y axis will move front and rear. Press SPIN: spindle on (on), spindle off (off)Press sod: return. TF card: TF card reader is to save to the root of g-code files. Color: WhiteMaterial: Plastic Size: 10*4*2cm (3.9*1.7*0.8in) Package Contents: 1*1.8inch Offline Controller Board1*TF Card1*Connection WireOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1cm.