This RCA modulation extender is composed of two identical small boxes. Each of them has a stereo RCA input / and output and an RJ45 connector. They thus make it possible to set up a long-distance transmission without loss and without noise using Cat5e/6 Ethernet cable much more suitable for this type of use than RCA. The circuits have insulation to greatly limit EMI interference that could generate distortion and noise, such as from a ground loop or a difference in electrical potential.