The photos are incomplete. The photos show only how it is connected to the laptop. No photos show connections to speakers or audio reproduction. In this competitive world, you have to think like a customer if you want to get ahead.
JAS54It's pretty simple. This is a USB class 1 audio device with a S/PDIF, digital coaxial, output that can feed a signal to a DAC or other audio gear with a digital coaxial input. There is no analog component in this device, it's strictly usb -> digital audio output. The actual, physical connection would happen via a 75ohm RCA cable.
Hope that helps.
P.S. this is not a DAC and is limited in resolution partly by the class 1 audio adapter spec.