Not used. Whether you're an Android or Apple mobile user, there's unique features for you to enjoy through the Beats app for Android or via the integrated Apple H1 chip's integration with iOS devices. Regardless of what device you use, everyone can enjoy the comfort and stability that's achieved by Beats Fit Pro - True Wireless Noise Cancelling Earbuds. Features & details • Flexible, secure-fit wingtips for all-day comfort and stability • Custom acoustic platform delivers powerful, balanced sound • Spatial Audio with dynamic head tracking for immersive music, movies, and games • Three distinct listening modes: Active Noise Cancelling, and Transparency Mode, and Adaptive EQ • Enhanced by the Apple H1 chip for Automatic Switching, Audio Sharing (with another pair of Beats headphones or Apple AirPods), and "Hey Siri" • Sweat and water resistant (IPX4-rated) earbuds • Up to 6 hours of listening time (up to 24 hours combined with pocket-sized charging case)