A:Answer You connect through the headphone jack on your computer. On a desktop, the headphone jack is often "split" into two: one for audio coming out (speakers or headphones), and one for audio going in (microphone). Since this headset has both headphones and a microphone, they provide an optional splitter. The splitter is an adapter that allows you to use this headset to plug into those two jack (audio in and audio out)s, rather than a single jack (both in and out), such as is common on a laptop or some desktops.
Hope that's clear enough