Amazon.com: Logitech G710 Mechanical Gaming Keyboard …

Finally there are 2 usb connectors because if you want to use the one that is on the top of this keyboard, it needs to be powered up so that’s why you would need to connect both usb’s to the computer, or just connect the one keyboard usb port (as indicated by picture on the usb cable) and you can immediately use your keyboard.

https://www.amazon.com/Logitech-920-006519-Mechanical-Gaming-Keyboard/dp/B00QI2WPJ8