The USB adapter plug connects Io Pro to the USB port of your camera. Io Pro then fires the camera over USB, and shows live view and photo review on your remote, watch or phone. No shutter cable and no camera Bluetooth are needed.
Cameras have different USB ports, so there are four plugs. Choose the one that fits the USB port of your camera: USB-C, Mini USB, Micro USB or Nikon 8-pin. If you are not sure, type your camera model on the camera compatibility page. It shows the USB plug of your camera.
Push the 3.5 mm end into the socket of Io Pro and the other end into the USB port of the camera.
Works with cameras that support USB (PTP) control, from Canon, Nikon, Sony, Fujifilm and Panasonic. Some cameras need a setting changed first. See the Io Pro manual.
Sold separately. It is not in the box with Io Pro.