Connect serial enabled devices at a distance of up to 3mThis null modem serial cable features male and female DB9 connectors. It enables a connection between serial devices at a distance of up to 3 meters. The length of the cable allows for flexible serial device setup configuration. The crossover serial cable mitigates EMI with its high-quality shielded metal shell connectors and aluminum mylar cable shielding. Install and secure the RS232 serial cable, using the thumbscrews. These connector screw locks prevent accidental disconnection which could lead to data loss/corruption. This product is backed for life, including free lifetime 24/5 multi-lingual technical assistance. The StarTech. com Advantage