Advantage 1.Add the outer casing: protect control board in transit,to avoid short circuit problem during use 2.Add the power button switch 3.Cancel the drive module,use integrated imported stepper motor drive,with short circuit protection,and integrated heat dissipation aluminum alloy 4.Add the fan port to force heat dissipation 5.Add offline recognition,can insert offline modules and computers at the same time.Offline will automatically identify if there is computer control. 6.Enhanced spindle drive,can support 20000rpm spindle.support more powerful spindle. 7.Improved USB interface: The original USB interface is patch soldering, transport collision and improper use, easy to drop, now changed to plug-in, very strong 8.The spindle drive increases the optocoupler isolation, which makes the control board generate less heat, and the spindle speed adjustment is more linear and safer. 9.Add emergency stop button port,probe port and XYZ limit port. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store