Noontec Zoro HD Adjustable On Ear Stereo Hi-Fi Earphone Headphone for PC MP3 MP4 iPod iPhone iPad Tablet Cellphone Mobile Phone-White Noontec's unique and perfect SCCB sound technology. (SCCB: surround closed cavity body). Connectivity Technology: Wired/Wireless Portable fold-up design; Unique flat cable design made of high-elastic TPE material, with in-line mic and answer/end button Protein cotton material for ear muffs Bi-directional adaptive ear muffs enhance low frequency audio performance Delicate adjustable steel reinforcement to enhance the headphone longevity