RCA White 2-Line Phone Splitter is a convenient phone splitter adapter designed to make connecting two phone lines effortless. This 2-in-1 phone jack adapter supports up to two lines, allowing you to easily share a single phone jack between multiple devices. It features a standard phone connector and a versatile 4-wire system that is compatible with both 2-wire and 4-wire phone systems, ensuring broad usability in various setups. Model Number: TP257WHR