Feature:1. Offline Control: With the offline controller module, you can control the CNC router without connecting to a computer, so the CNC router can be placed anywhere you want, such as garages and workshops.2. Manual Control: The XYZ axes position can be manually adjusted as the starting point for engraving. The module can also manually control the spindle on or off mode.3. Simpler Access: After the file is put into the memory card, the engraving file can be directly recognized. You can also connect the offline module to a computer via a micro USB cable and store files directly.4. Ideal Matching: The offline module is perfectly compatible with 3018, 3018 PRO CNC routers and other general purpose 3018PRO CNC routers.5. Easier Working: You just need to connect the offline module to the GRBL controller board and then you can use this module to control the CNC router.Specification:Item Type: CNC Router Offline Control ModuleConnection: USB, USB CH340. Software: GRBL Controller, universal G Codes transmitter. Input Voltage: 12-36VMain Control Chip: For atmel 328P. Stepper Motor Driver: A4988Spindle Drive Chip: MOSFET, recommended 12-36V, within 10A. Spindle PWM Speed Regulation: supportSupport Stepper Motor: 12V, within 1.5A, it is recommended that the maximum current be less than 2A, stepper motor 42, 57. Engraving: SupportsPower Interface: 5.5-2.5mm DC interface.How to