These seem to be a really nice set. They work with cell phone, mp3 players, computers and laptops, video game systems, tablets, pretty much any device that has an audio cable jack. They are foldable, they also have a pull/push size adjustment, so they pretty much fit any head. They also come in a nice box, that can be kept for storage. They have a long cord so you don't have to set right on top of your device. They have an inline microphone so you can use them while talking on your cell phone.
The volume is very nice, you do not have to turn your device all the way to be able to hear while using them. The sound quality is also pretty good.
I was given this set to try and give an honest review of, and honestly I think for the price yo can't go wrong. It is a very nice set.