The HP 855560-001 USB Type-C to RJ-45 adapter connects a USB Type-C port with an RJ-45 network connection. It provides a wired Ethernet link for a device with a compatible USB-C port.
One end uses USB Type-C and the other uses RJ-45, making the adapter a compact link between these two connection types. It is listed as a USB-C/RJ-45 data transfer adapter, suited to connecting a computer to a wired network when its available port is USB-C.