Good fit connection but only via jack impossible - recording volume is too low

the quality and value of the headset I can associate myself with the overwhelmingly positive reviews.
The packaging is valuable and resealable.
The headset itself falls on high quality workmanship. While wearing one feels barely pressure on the ears. The material of the ear pads here feels very pleasant. The slightly resting earpads ambient noise will not significantly dampened. For a brief conversation sufficient lowering the volume using the handy controller. The taking off the headphones is not necessary. Next noticed the very long connection cables enable a proper cable installation.
Unfortunately, the connection of headphones and microphone purely about 3.5 mm jack was not possible.
Although the system allows you to connect the speaker input with a 3.5 jack connector, the Micro is connected but exclusively via USB.
Moreover, in my device the recording volume of the microphone was clearly too low, resulting in a return of the article.