This board does exactly what it says on the box: It outputs a voltage between 0 and 4.2V with 1mV resolution. Many industrial controllers expect an analog voltage as an input signal, and this Phidget will bridge this communication gap. It will also launch a warning event if it fails to deliver the voltage you've selected (for instance, when the attached device is drawing too much current). This board is the fastest, most efficient, and most economical choice for voltage output. The OUT1000 connects to a port on a VINT Hub.