The HP 746222-001 front I/O user interface assembly is a spare part for the front of compatible HP workstations. It brings commonly used connections to the front of the computer for convenient access.
The assembly is listed for HP Workstation Z440, Z640 and Z840. Its connections include multiple USB ports, an IEEE 1394 port, plus separate headphone and microphone jacks, providing access for USB devices, audio output and microphone input at the front panel.