The UltraFit 1000 model offers a surprisingly powerful headphone audio performance, with moderate noise reduction and the convenience of in-line controls & microphone. Adjust your tuneage, or take that call, all without ever breaking your stride. The innovative SecureFit ear hook design keeps these buds resting comfortably in the mid-flange area of your ear, even during rough play, so you never miss a beat, either. The UltraFit 1000A is optimized for use with Android Smartphones. Moisture shield technology deflects and resists moisture, for peak performance through the most strenuous activity. 3.5mm connector is designed to fit through the opening on all i-gadget cases. Engineered for durability, performance & comfort, and made with the most advanced materials and headphone micro-technology, to be the last pair of sports headphones you"ll ever need.