* This USB Host adapter cable turns your DJI Osmo Action 4 into a USB host, allowing you to connect a USB memory stick, a mouse or a keyboard to your DJI Osmo Action 4. * PC-free back up of videos and photos from DJI Osmo Action 4 to an external memory stick in a convenient way. * Connect to a keyboard or a mouse for easier control of your DJI Osmo Action 4. * This cable is used to connect the USB Type-C port of your DJI Osmo Action 4 to the USB Type A plug of your compatible USB device.