Beyerdynamic Custom i On-ear Headphones Adjustable sound pattern & bass level Changeable design Cable with microphone & remote Exclusive 38 ohm design ideal for mobile use The CUSTOM i-Series is one-of-a-kind, as it allows you to redesign and re-engineer your headphones at any time, making them the perfect match for whatever the situation or your mood demands CUSTOM Style CUSTOM Style allows you to change the look of your headphones at any time 16 included design covers are only the beginning You can also choose from different optional rings and additional design covers to create your own unique style combination