Wired Earphones With Mic For Mobile Phones Generic 5 Pieces Powerful sound : dynamic, crystal-clear sound and deep powerful bass with soft silicone, ergonomic earbuds block outside noise and perfect in-ear seal blocks outside noise and perfect in-ear seal blocks Rating:jack diameter: 3.5 mm,frequency range (Hz): 15 - 20000 hz and impedance (Ohm): 32 ohm Comfort: the noise-cancelling microphone enables trouble Compatible devices : integrated microphone and smart remote for enhanced usability and optimised for mp3, ipod, iphone, cd players,portable gaming systems and all smartphones