USB Micro-B on one end (For phones tablets, etc.) An Ethernet port on the other You can use this to have Internet access on your phone/tablet without Wifi. You need to check on this website to make sure your phone works with it. I didn't check before buying and mine didn't work... https://plugable.com/products/usb2-otge100/ Devices that should work (Check for "yes" in the description)