Sennheiser CX 215 Earphones - Green Innovative finger-tip contoured design delivers precision placement in the ear-canal Powerful bass response without bloated, over-exaggerated muddiness Aggressive noise isolating thanks to precision fit ear canal design Symmetrical cable with 1/8" (3.5mm) headphone jack that works any audio source including iPhone, iPad series and Android devices (listen-only) Built-tough with a global 2 year warranty