Fantastic product, i bought the Sennheiser HDR 170 with the base station, and also the Additional Headphones for myself and my girlfriend, as i work from home, Video editing, Web Site design, could work undisturbed, also when playing playstation games or both of us are listening to music /tv late at night, no problems with range, and we have a large apartment/flat. charge quite fast, lightweight and very comfortable. sound quality very good. How much would it cost for a speaker system thats better (and how much space and cabling would it take up) only one grip. Could not adjust the volume of each set individually (as i like mine louder) they are plugged into a £800 Sony AV Reciever with the Computers, Playstation and Tv all Connected, very happy with them best headphones i have ever owned.