Brand Name: Monster | Color: WHITE | For Modular Phones: Yes | Number in Package: 1 pk | Number of Conductors: 4 | Packaging Type: Carded | Sub Brand: Just Hook It Up Make a network extension cord out of two 10 Base-T Cat 5 network patch cables with an RJ-45 coupler. Both jacks accept one RJ-45 plug, allowing you to plug an Ethernet cable into both sides. | Use to extend modular telephone line cord between wall plate and telephone | For use with single phone line | Designed for connecting phone, modem or fax machine to wall jack