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• New high-speed 1.8-inch Grbl offline controller Linking Grbl motherboards allows you to engrave files offline.

• Read 600 files at a time.

• You can connect a computer USB to transfer files to this controller.

• Compatible with all versions of Grbl.

• The baud rate is adjustable.

• 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 Back.

• Press  SPIN: Spindle on (Laser on ), Spindle off (laser off)

• Press Z+ for 5 seconds:   change the Language to English.

• Press SMOD: return.

• SD card: SD card reader is to write into the root directory G-code files .