About this item USB C Headphones compatible with various devices including iPad and Macbook; suitable for most USB C devices, ensuring wide compatibility. The cord is strengthened for longer durability. Support Volume+/-, Last/Next Track, Pause, Answer/End/Reject Call to free your hands when listening to music, having phone calls while driving, walking, exercising, working, shopping, etc. NOTE: If the earbuds have no sound when used on mobile, go to Settings - Developer Options, find Disable USB audio routing, and close this option. Built-in Mic and Volume Control: Wired earphones with built-in mic and remote control allow you to answer/end calls, play/pause songs, skip next/previous songs, and adjust volume without picking up your phone while working out, driving, or on the go. Warm Tip: The default setting for audio output and input of some laptops/desktops may be set to speaker. Please go to Settings - Sound - Input (Output) - Select a Device for Sound Input (Output), then choose US