Jabra C120s Corded Stereo Earset - Compatible with 2.5mm and 3.5mm Phones Corded headphones featuring premium stereo sound quality with clear detailed sound reproduction Ergonomically designed for sports; sweat and water resistant Sound isolating ear buds with Lock In Gels Microphone wind-noise reduction technology; controls can be used to answer/end calls 2.5mm Headset - Comes with 3.5mm Adapter - Compatible with ALL 3.5mm jacks and 2.5mm audio ports