Additional Details ------------------------------ Product description: Monster Cable In-Line Coupler 4 Conductor Modular White Card / "MONSTER" 2-WAY MODULAR IN-LINE COUPLER *4 conductor *White *Converts a single modular telephone link hook up in-line to a dual adapter for a telephone and other phone device(fax machine,etc.) *One end is a single modular jack, other end has two modular jacks *Carded