How to use speaker in the same time with my usb headphone(Steelseries siberia v3 Prism)

[sumbaidp]

Guys i want to ask u all, how to use my speaker and usb headphone in the same time, Before im buy this usb headphone, im use 3.5 jack and my speaker just working fine play it in the same time. i need your help here XD

 

[americanaudiophile]

I don't think you can get Windows to use two audio devices at the same time from the same program.