Why? Well, because this product does not work on all mobile phones. Of course this "detail" is not specified anywhere. So you order these headphones so that works with a mini-jack priori no worries. Also from a hyper guitar amp brand recognized short it is cool! Nope if you have a phone that accepts these headphones that rolls if the seller that you will write the resume but keeping pdfs 4 AND 12 caps for different sizes they ask you to keep (remember surely) matter of hygiene. Do not rely on amazon to help their policy on this case is: "Courage flee" ...