A no compromise, high-performance noise-isolating headset plus earphones that delivers best-in-class benefits and superior value, perfectly matched to the latest product innovations from most smartphones that support a 3.5mm/4-conductor stereo phone plug. Inline Remote: 1 Button with Microphone. Transducers: balanced armature. Cable: 4 ft with 3.5 mm plug. Compatibility : Works with smartphones and tablets including, but not limited to, those running Android, Blackberry, Windows Phone, HP WebOS, Symbian and Apple iOS. Functionality for send/end, play/pause, forward/back track varies with device manufacturers" software. Pl. Impedance: 16 Ohms. Noise Isolation: 35-42 dB.