these bud will not stay in you ear if you go for a run , but I use they at work every day , in one ear only , and the sound quality be very good . I plug they into a cheap set of computer speaker that sound awful alone . the sound be so much better through the earbud . unlike my co-worker ' headphone , these be silent to everyone else . when I take they off I can not hear a peep from they . my only complaint be that the 4 ' cord be not long enough to plug directly into the computer under my desk .