C2G/Cables to Go 01919 RJ11 4-Pin Modular Crossed Inline Coupler<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Connect two single-line telephone cables together to extend the overall connection </span></li><li><span class="a-list-item"> To link several line cords together， or extend modular cable runs， this modular coupler can help you make the right connection. It provides a female-to-female feed-through connection for easy cable hookup </span></li><li><span class="a-list-item"> Use for data/voice applications. </span></li><li><span class="a-list-item"> Lifetime Warranty </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31ORD3oLFHL.jpg" noproxy>