Ground Loop Isolator,Ground Loop Noise Isolator For Car Audio/Home Stereo, Black This is a device that eliminates the noise of the power amplifier speaker.it improves the current sound produced by the device through the audio equipment-isolator-speaker. It can be used in two directions.(Note:the left and right channels of the output end alternate) dual RCAinterfaces. Widely used in recording studios, broadcast conferences, projection and power amplifiers,car speakers,etc. Stereo audio isolationer?Provides clear sound by removing hiss, buzz and interference from PC, home audio or car stereo system. You can enjoy the clean and clear music/audio by eliminating the current noise in some car speakers / home stereo systems. Plug and Play:It can be used in two directions. (Note: The left and right channels of the output end are used alternately) Double RCA interface, that is, plug and play without downloading and installing any software. When the grounding problem continues to exist, it is suitable for any device with an RCA interface, including recording studios, radio meetings, projection and power amplifiers, car speakers, etc. Backed by a one year warranty from Szyafei for peace of mind. Contact our customer service team at any time for no-hassle troubleshooting and replacement or for any questions about purchasing.