Hoomia S8 In-Ear Stereo Earphone with Micro Phone, Black/Red 9mm Dynamic Driver for deep stable bass and treble Hi-Fi acoustic metal coated diaphragm with metal sound chamber, provide high fidelity sound performance PRS(Pressure Relief System) plus medical grade material ear pads soft touch make it comfortable to wear High quality copper wire increase sound effect, flat cable design tangle-free In-line micphone, won't miss the call while listening music