This XMSJSIY DSL Filter Splitter which enables simultaneous connectivity of a device to two phones. It is expertly designed compatible with segregating voice signal and ADSL data signal in telephonic cable, remarkably diminishing any possible interference of ADSL data signal with the call quality. Essentially, it ensures a smoother and more efficient communication experience. Our telephone RJ11 1 to 2 converter is designed to filter low-frequency voice signals and high-frequency data signals seamlessly. Ensuring non-interference when being transmitted on the same cable, it effectively resolves issues like decreased ADSL speed or frequent power outage caused by static high-frequency signal loss in some telephones. Constructed with and durable plastic material, our telephone splitter ensures superb signal transmission and offers an extended lifespan. Equipped with a special protection feature against communication cable induced lightning-strikes and over voltage impulse current, it guarantees secure and reliable usage. No external power supply required and easy installation ratio. It is suitable compatible with network ADSL clients and deemed as the best ADSL telephone language separator in the telephone communication network signal. Enjoy a hassle-free setup process and dive right into an uninterrupted connection experience. Fully compatible with all standard RJ11 devices such as landlines, faxes, answering machines, office lines, DIRECTV, satellite dishes, TIVO (DVR), phones, printers, computers and more. Offering versatility with extreme efficiency, our DSL filter splitter is an indispensable device in your routing and connectivity setup. Colour: White Material: Plastic Package Contents: 4 x ADSL Splitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.