Motives for buying a new headset were: 1. Free movement in the apartment 2. Trouble-free listening by digital reception 3. Good sound quality 4. Balance control on the headphones (different hearing my ears) 5. Good seat headphone These ideas promised me the headphones from Sennheiser meet. I was not disappointed. Interference-free reception in the whole house at very good sound quality, more effective for me balance control and a very good Seat headphone after prolonged listening, also due to the velor earcups. The operation of the headset on the right earpiece was only a week to get used to. On the lack of a written manual I have now at another, used much more expensive devices (televisions, cameras). Regrets I have only the late purchase of this device.