6 Foot DB9-Female to 3.5mm TRS Connector Male
Connects a DB9-Female to a 3.5mm TRS Male Connector
Designed for Generic Serial Data Transfer Between Devices
Features a Stereo 3.5mm Jack
Allows Connection to a DB9-F Serial Port
Ideal for Small Device Serial Data Transfer

Wiring Schematic
DB9 TRS Tip-Ring-Sleeve Connector 3.5mm
Pin 1-6-7-8
Pin 2 Tip - Left
Pin 3 Ring - Right
Pin 4 Open
Pin 5 Ground
Pin 9 Open
Shell Sleeve-Shield-Ground