Expand one jack into two with the Power Gear Duplex In-Line Coupler. This discreet, coupler allows you to connect two compatible devices to one phone line while increasing reach to the wall jack or between equipment - all without losing signal quality. In addition to phones, this convenient duplex in-line coupler is ideal for connecting answering machines, modems, fax machines, caller ID displays and other devices to a single phone jack, providing you with various setup options for your space. This duplex in-line coupler's white finish and discreet, compact design make it ideal for home or office use. With two jacks on one end and one jack on the other, this coupler is easy to install and compatible for use with all brands of telecom equipment. By simply adding this coupler and three phone line cords (sold separately) to your setup, you will double the functionality of a single wall jack while also achieving extended reach - all without the added expense of adding an additional wall jack or purchasing extra-long phone line cords. Make your home or office more efficient with the Power Gear In-line Duplex Coupler.