This Zipper Earphone is made of aluminum alloy. Standard 3.5mm earbud plug convenient for mobile phones like Phone 5 5s 6 6s Plus S6 S5 S4 Note 3 4 and also MP3 MP4 laptop and computers. High quality rich sound, good choice for listening to music, watching movie, talking on the phone. Flexible with its zipper flat cable that fits many sizes. 9 color choices. Great idea to promote your band.