* This USB Host adapter cable turns your Apple MacBook Air 15 into a USB host, allowing you to connect a USB memory stick, a mouse or a keyboard to your Apple MacBook Air 15. * PC-free back up of videos and photos from Apple MacBook Air 15 to an external memory stick in a convenient way. * Connect to a keyboard or a mouse for easier control of your Apple MacBook Air 15. * This cable is used to connect the USB Type-C port of your Apple MacBook Air 15 to the USB Type A plug of your compatible USB device.