The installation of the handset in the headband into one must make himself.
The description for this is extremely poor, but if you have it then grasped times, It's very good.
Good that the listeners are not entirely fixed in the headband. You can shove the handset in the tightened headband right or customize ..
Then they are - at least for me - very comfortable and do not wear too thick in my ear.
Sound quality is very good - the values indicated seem to apply!
I have two further copies ordered and will always and everywhere use, where I previously used other listeners the set.
