Riin Adjustable Circumaural Super Bass Pro Stereo Earphone Headphone for Cellphone PC MP3 MP4 iPod iPhone iPad Tablet (Black) Supports iPods, MP3/MP4, iPhones, smart phones, iPads, PC/notebook and all devices with standard 3.5mm earphone jack. Comfortable over-the-head, around-the-ear wearing style ensures noise blockage, low song leakage, and great audio quality. Adjustable cushioned headband and lightweight design for maximum comfort Dynamic 40mm drivers deliver crisp sound and deep bass Cord length: approx 82 in.