Al principio el conector 3. I like the plastic cord they come with alright, but its a bit stiff so its more work to straighten out the kinks and then wrap it back up into a small ball that will fit in my pocket when Im done with them. Ill be keeping them because they are cute but thats about it. The one thing that spoils the look and probably the build durability is the battery closure which is clunky and leaves gaps wide enough to admit dirt and even insects although hopefully they shouldnt come into contact with either on a regular basis! I was nervous about the fast charging ability but he thinks his S6 and bluetooth headset actually charge faster with these cords although he does use an actual fast charging wall plug with the 6 ft cord in the house. The strap cut into my foot and was not forgiving. But, there are a lot of apps on an iOS device that can tune sound to improve earphones. I bought it for my grandmother. Product as described- for a gift so cannot comment further It is stereo and not surround sound so perfect for the games I play.