Genuine Dell Front USB Audio I/O Power Board Optiplex 330, 360, 755, and 760 Small Mini-Tower (SMT) Systems Part Numbers: TP004, CN312, W6275, HU391 Genuine Dell Front USB Audio I/O Panel For Dell Optiplex 330, 360, 755, and 760 Small Mini-Tower Systems 2x USB Ports 2x Audio Ports