I use these two. It gives you 3 USB ports and an Ethernet port. Works great.
Note: After you plug in the hub, you will need to reboot for it to work. Also the GPI controller will not work till you unplug the hub and reboot, but you can just plug a keyboard into the hub.
USB Hub with Ethernet - UGREEN RJ45 Ethernet Adapter with USB 2.0 Hub & Micro USB 2.0 OTG Cable