SainSmart CNC TB6560 Stepper Motor Controller (4 Axis) Interface with Standard parallel port , support MACH2, KCAM4 series software. Limit interface with 4-ways, Plug connector designed fby connecting limit switches as you like Support four running mode, such as mixture, fast, low, normal mode. Support the choice of four segments - 1,1 / 2,1 / 8,1 / 16 Stability, and small heat,24-36V single power supply input with switching power chip supply 5V power