Connecting Cable, PC USB to Relay

hi I'm trying to sell it national control devices today I'm going to show you an easy no fuss set up for our relay controllers using USB connection so what we've got here is let's just say I'm a customer and I just got my package in from national control devices here when I unpack it I'm gonna have my relay controller here with the USB connector it's the most important part I'm gonna have a power supply if I opt for one and check out I would recommend purchasing one of our power supplies reason being our power supplies are computer grade 12 volt DC regulated power supplies very very important if you've got a Radio Shack and just by a generic power supply for 12 volts DC there's nothing to say that that thing's computer regulated or computer grade and highly regulated but these are so there's my power supply I also got a USB cable here for connecting to my computer so this is nice and th