HP Envy TouchSmart 15 - Microphone Jack

Hi all! I've recently bought Razer Tiamat Headphone and only realize the notebook doesn't come with microphone jack for me to plug in the microphone output. 

I understand the technology with the 2-in-1 jack built in but it doesn't help me solve the issue since I still can't use the mic with my headphone. 

Any suggestios or alternatives? 

Thanks for the help in advance!