Functions and Features: High performance, cost-effective Maximum support 5-axis stepper motor driver controllers Compatible with MACH3, Linux CNC (EMC2) etc. parallel-control CNC softwarey USB power supply and peripherals powered phase are separated to protect computer security All the signals are opto-isolated which can protect your computer security. 5-input interface to define the Limit, Emergence-Stop, Cutter alignment etc. Wide input voltage range: 12-24V, and with anti-reverse function. One relay output control interface, accessed by the spindle motor or the air pump, water pump, etc Compatible with all the 2 phase microstep drivers in the market Output 0-10V analog voltage for invert er to control the spindle speed https://www.youtube.com/watch?v=I00ArvYvZgI