This serial cable features female DB-9 and male 3.5mm connectors. It enables remote serial RS232 calibration of TVs, projectors, and digital signage devices that feature a 3.5mm audio jack. Secure the DB-9 connector by tightening the integrated thumbscrews. These connector screw locks prevent accidental disconnection which could lead to data loss/corruption. Adapts a DB9 connection to a 3.5mm connection, Allows foe 3-conductor RS-232 control signals between your control unit and your video display. DB9 Serial to 3.5mm Pinout DB9 Pin 3 to 3.5mm Tip DB9 Pin 2 to 3.5mm Ring DB9 Pin 5 to 3.5mm Sleeve Connector 1: DB9 Male Connector 2: 3.5mm Male DB9 Female to 3.5mm Male Serial RS232 Adapter Cable Enabling data transmission between devices with DB9 and 3.5mm audio jack interfaces Why run all new cables for RS-232 control of your audio/video system, when you can use this easy adapter? The RS-232 adapter leverages your DB9 or 3.5mm stereo audio cable to run 3-conductor RS-232 control signals between your control unit and your video display. Fully molded DB9 and 3.5mm connectors provide excellent strain relief. This adapter is ideal for use with computers, projectors, and any control unit/display requiring 3-conductor RS-232 serial control. Please Note: Not all serial control methods are supported by this adapter. This product is intended only for use with 3-wire RS-232 control cables with common ground (pin 5), transmit data (pin 3), and receive data (pin 2)