Polk Audio UltraFit In-Ear Sport Headphone made for Android (Black/Green) Ultra-high performance digital sound, focused details, full fidelity and deep bass. Convenient 1-button in-line controls & microphone, for on-the-fly audio and phone control without breaking your concentration SecureFit support keeps your headphones comfortably in place even during the roughest workout. Ultra-flexible tangle-free planar audio cable eliminates cable tangle. StrainGuard Kevlar core technology and computer-designed transitional connections eliminate cable failure.