GGMM Hummingbird &ldquo;&rdquo; Crystal Clear Sound In-Ear Noise-Isolating Headphone w/Full Metal Housing Dynamic Dual Drivers & Universal 1-Button Microphone (Black) The Hummingbird earphones feature incomparable noise-cancelling sound quality, sleek design, and ergonomic design. The microphone button allows you to answer/end phone calls and control music. Economical design with comfortable rubber caps Noise cancelling microphone Gold Plated pins reduce impedance Provides an integrated call answer/end function