Sennheiser 504587 is a high-quality headset designed to provide pure sound with deep bass and block outside noise. It is compatible with virtually all major Smartphone brands, including Samsung, HTC, Sony, Nokia, Apple, and Blackberry. The in-line remote control with integrated microphone makes it easy to take and end calls, and the easy volume control on the ear-cup allows you to change the volume level without taking your phone out of your pocket. The single-sided cable reduces tangling, and the rotating right ear-cup provides flexibility and comfort.