Help with Razer Headset

Hello. I recently got a new headset, a razer one. When I opened it I realized it only had one input instead of my last one which had two, one for the microphone jack and one for the headset jack. On my computer I have two ports that work for audio related things, microphone, and headphones, how do I make it so I can use my razer headset in one of the ports for headset as well as mircrophone? Thanks.