2 Way RJ11 Splitter lets you plug in 2 phone devices to 1 wall Plate socket, It allows two telephone or modem with RJ11 plug to connect to a single RJ11 telephone socket. This US Telephone Splitter is very simple to use. You just plug the adaptor into the RJ11 phone socket, and plug your RJ11 cables into the adaptor. Our Two Way Telephone Splitter can be used not only for telephone, but and for FAX machine with your Ooma VOIP telephony unit. This makes it perfect gadget for your office. Our Two Way Telephone Splitter is made of durable plastic material that you can trust. This has good value for mobile and call center marketing exercises. This device has a fast setup and is very easy to plug and play.