Buying these headphones was a terrible mistake. The sound is flat and lifeless and the volume controls do nothing. I bought these to use with my Palm Pre. I don't know if the problem is Pre related, the Pre's bluetooth stack has a lot of deficiencies, or if these are just lousy headphones. Either way the combination of the Pre and these headphones is not a good one, Palm Pre owners should avoid these. I have a cheap pair of wired headphones that have an order of magnitude better sound when used with my Pre.