The Pixel uses a usb-c and the usb-a is the rectangle one that will fit into a desktop or laptop usb slot 2.0 or 3.0. It will also fit another 110v adapter, but not the Google Pixel adapter. The Pixel adapter is usb-c also so you would need a cord that was usb-c on both ends to work with the Phone and the included adapter. Hope that makes sense.