It can charge and transmit data, but it can't be used for headphones!Fast Charging: Mxcudu USB C iPhone Adapter supports fast charging(up to 5V/2.4A) on the iPhone 11/XS/X/8/8Plus/7/7Plus with original USB C Power Adapter and other Wall Charger or Power Bank This adapter can by only used for charging your iPhone device or iPad and Data Sync. Not support connect with other adapters, hubs or headphones Compatibility: Our little adapter compatible with iPhone 11/11Pro, iPhone XS/XR/XS Max, iPhone X/8/8 Plus, iPhone 7/7 Plus/6/6 Plus/6s/6s Plus, iPod Nano 7, iPod Touch 5, iPad 5, iPad 4, iPad Air 2, iPad Air, iPad Mini 3, iPad Mini 2, iPad Mini Retina