The Tripp Litestraight through modular in-line coupler offers a simple and easy way to link two cables with RJ11 plugs. This in-line coupler straight-through wired configuration and has gold plated connectors for superior conductivity. It allows you to connect RJ11 female end to RJ11 female end. Inline coupler is suitable for telephone type applications. Connections: RJ-11 female connector on both ends. Connectivity: Wired. RoHS and TAA Compliant. Contact material: Gold-plated. Compatible with PC and Mac computers. Comes incolor. Straight though design for easy installation. System requirements: Two cables with RJ-11 male connectors. Comes with lifetime limited warranty. Tripp Lite RJ11F to RJ11F modular in-line coupler provides a female-to-female feed-through connection and allows you to extend the length of a patch cable.