the headset be buy for my slightly deaf father . he live in a nursing home and have a roommate . I choose the rs-140 because it have the `` closed can '' to shut out the -lrb- also hear impaired -rrb- roommate 's tv etc while allow my father to hear he tv . the setup work great . the separate volume for each earphone allow perfect balance to compensate for differential hearing ability in each ear . if you want to be able to hear the room as well as the music go with the rs-130 to get the `` open can '' . I use the headset during the setup and find no fault with the sound quality or reproduction and there do not appear to be any interferance from other electronic device . he sometimes wear the headset `` down the hall '' and the quality do not begin to degrade -lrb- through concrete block wall in a steel frame building full of medical equipment -rrb- for about 80 foot -- in open air I be sure it would be double that . the headset be comfortable and the charge arrangement be transparent to the user . my father find the charge stand `` a little tippy '' because he have to reach the headset with a grabber from a wheelchair across a bed . mount the charge base fix that . a person use they hand would not have this problem at all .