This breakout board connects to second-generation Duet boards (Duet Wifi or Duet Ethernet) expansion header and is specifically designed for external drivers that take differential signals at 5V. It breaks out each of the 5 Expansion header stepper channels as follows: Step+ Step- Dir+ Dir- En+ En- It also breaks out heater 6 and 7 signals to 5V. It comes with Molex KK compatible connectors and crimps, along with the 50way IDC cable to connect to the Duet expansion header.