This serial cable features male DB-9 and 3.5mm connectors. It enables remote serial RS232 calibration of TVs, projectors, and digital signage devices that feature a 3.5mm audio jack. High Quality Construction The aluminum-mylar cable shielding and metal shell connectors mitigate EMI. The molded PVC connectors with strain reliefs and PVC cable jacket prevent damage caused by strain and/or abrasion. Secure the DB-9 connector by tightening the integrated thumbscrews. These connector screw locks prevent accidental disconnection which could lead to data loss/corruption. 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 This product is backed for life, including free lifetime 24/5 multi-lingual technical assistance.