Polk Audio UltraFit 2000a On-ear Sports Headphones for Android Made specifically for Android Phones Ultra-high performance digital sound, focused details, full fidelity and deep bass. Convenient on-ear controls & microphone, for on-the-fly audio and phone control without breaking your stride. SecureFit support keeps your headphones comfortably in place. Moisture shield technology deflects and resists moisture, for peak performance through the most strenuous activity.