... four 2.5A stepper motor simultaneously,With 5-axis expansion, if you need to extend it;2, Isolated ... stop effectively;5, The interface with the fans, you can add any fans;6, With 4-way 0.8-3 ... output two-phase bipolar stepper motor driver;7, Interface with Standard parallel port , support MACH2, KCAM4 series ... limit switches as you like;9, Support four running mode,such as mixture,fast,low,normal mode;10 ...