This audio adapter by Delock enables the connection of a device with 2.5 mm 4 pin stereo jack male connector to a 4.4 mm 5 pin stereo jack female port.

System requirements:
• A free stereo port 4.4 mm 5 pin

Specification:
• Connectors:
  1 x 4.4 mm 5 pin stereo jack male
  1 x 2.5 mm 4 pin stereo jack female
• Pin assignment:
  L+  1 - 3
  L-   2 - 4
  R+  3 - 2
  R-  4 - 1
• Connector finishing: gold-plated
• Colour: black

Package content:
• Stereo jack adapter

Data sheet:
http://www.delock.de/produkt/65996/pdf.html?sprache=en