New update :
After few days of the use, here is my additional review.
Wearing them for longer period ( 2-3 h constantly) it is not so comfortable. My ears hurts a little, like an uncomfortable feeling. also when I fully push the headphones into the ear canal, a vacuum is created, as if I were in a pool. It bothers me the most while talking to someone because I have a feeling I’m talking 5 times louder. Maybe i need to choose smaller tips xD
Battery life time. For example today I listened online training for exactly 3 h, both headphones ( 100 %) and after 3 h, battery was on 20 % . 7 hours is demonstrated on web site… so , something is wrong ? or not
Sound quality is awesome. In call quality is also great, I checked that one more time, this time without issues.
No weird hiss sound. Quality is great.