Question about Jabra Evolve 40 UC Stereo

Sorry, my answer was wrong, the control unit has USB-A as described in the product. I had remembered that incorrectly.

These headphones have both. With the control unit it is USB-C, but you can also use the headphones without the control unit. Then you have the 3.5 mm jack plug from the headphones, which is normally in the control unit. Only at the same time does not work. But that doesn't make sense in my eyes either.