With Sennheiser's CX 275s universal mobile music and communications headset, you can hear Sennheiser signature sound on the go, regardless of which smart phone you have. The high-powered dynamic speaker systems provides an outstanding audio performance. Ear adaptors in different sizes allows for an excellent ear canal fit and ambient noise attenuation. Take Full control with the in-line microphone and remote and switch between calls and the tracks. The CX 275s is all about enjoying music tracks while keeping you fully connected on the move . Supports any smart phone that has a 3.5 mm headphone jack.