Sennheiser MM 70 S Ear Canal Headset for Smartphones, Black Universal fit - compatible with virtually any smart phone in the market featuring 3.5mm headphone jack, including Android, Windows Mobile, RIM (Blackberry) and IOS devices Vibrant sound with punchy bass - high-output neodymium magnets for stereo sound with powerful bass response Comfortable fit - robust ergonomic ear-canal buds and three pairs of ear sleeve sizes for best custom fit 2-year warranty