This is the SD Card Reader Audio I/O Board, sometimes called a Databoard or Daughterboard for Dell XPS 15 9720 & Precision 5770 series, this replacement part consists of ONE SD Card Reader slot (RTS5243 IC Chip) and ONE Audio Headphone Jack (ALC711 IC Chip), and go to official website find the instructions before installing. NOTE: Ensure to connect IO marked side of the I/O-board cable to the I/O daughter board and the side marked MB to the system board. D P/N: P71NP, 0P71NP Manufacturer Part Number(s): 46M.0PUBD.0001, ASSY, PWA, DTRBD, AUDIO, 5770/9720 Condition: Original and NEW condition without original box shipping. Reference list of compatible with laptop models: - Precision 5770 Mobile Workstation - XPS 17 9720 - XPS 17 9730 What's in the box: 1x SD Card Reader Audio I/O Daughter Board (REV A00)