Feature: 1. Offline Control: With the offline controller module, you can control the router without connecting to a computer, so the router can be placed anywhere you , such as garages and workshops. 2. Control: The axes position can be manually adjusted as the starting 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 -USB cable and files directly. 4. perfect Matching: The offline module is perfectly compatible with 3018, 3018 PRO routers and other 3018PRO 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 router. Specification: Color: white Material: plastic Item Type: Router Offline Control Module Connection: USB, USB CH340. Software: GRBL Controller, universal G Codes transmitter. Input Voltage: 12-36V Main Control Chip: For 328P. Driver: A4988 Spindle Drive Chip: MOSFET, recommended 12-36V, within 10A. Spindle PWM Speed Regulation: support Support : 12V, within 1.5A, it is recommended that the maximum current be less than 2A, 42, 57. laser-Engraving: Supports Power Interface: 5.5-2.5mm DC interface. Package Contents: 1 x Router Offline Control Module 1 x 8P Cable 1 x Memory Card 1 x Memory Card Holder Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.