Your MG20 Wireless Gaming Headphones come with the ability to use Wired (passive) audio.
Wired Audio (Analog)
For wired audio, please use the provided USB-C to 3.5mm cable and plug it into your headphones' USB-C audio input. Please note that your headphones are required to be powered ON prior to plugging the USB-C cable into the headphone for passive audio to work.