Sennheiser CX 1.00 Black In-Ear Canal Headphone 28-ohm impedance transducers deliver powerful sound and deep bass New, ultra small design provides excellent wearing comfort Choice of 4 ear adapter sizes ensure good fit for effective noise blocking 1.2 m symmetrical cable with 1/8" (3.5mm) headphone jack works any audio source including iPhone, iPad series and Android devices (listen-only) Two year warranty when purchased from an authorized Sennheiser dealer