This product is for advanced users that are comfortable soldering and tinkering with the Linux code/scripts. Please ask us if you have any questions about this.
Some photos/videos shown here are from a test unit. The white wire that runs from “40” is only necessary if you want to program the Pi to turn the fan on/off when necessary. You could also wire it full on or add a switch (on your own) if you want to go that route.