Item Type: CNC Router Offline Control Module Connection: USB, USB CH340. Software: GRBL Controller, universal G Codes transmitter. Input Voltage: 12-36V Main Control Chip: For atmel 328P. Stepper Motor Driver: A4988 Spindle Drive Chip: MOSFET, recommended 12-36V, within 10A. Spindle PWM Speed Regulation: support Support Stepper Motor: 12V, within 1.5A, it is recommended that the maximum current be less than 2A, stepper motor 42, 57. Laser Engraving: Supports Power Interface: 5.5-2.5mm DC interface. Package List 1 x CNC Router Offline Control Module 1 x FC 8P Cable 1 x Memory Card 1 x Memory Card Holder 1 x User Manual The router cannot be connected to the offline controller and the USB cable at the same time. Disconnect the USB cable from the router before connecting the offline controller. 1Offline 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. 2Manual 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. 3Simpler 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. 4Ideal Matching: The offline module is perfectly compatible with 3018, 3018 PRO CNC routers and other general purpose 3018PRO CNC routers. 5Easier 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.