Working Principle: The working principle of this noise isolator is to achieve clear voice and music by eliminating the current noise in some car speakers and home audio systems. Widely Compatible: Works with any portable device with 3 pin XLR input and output, for car audio system, home audio, when grounding issues remain. Easy to Use: Plug and Play, no complicated setup required, all you need to do is plug in the ground loop isolator. Portable: Small and lightweight, does not take up much space and can be easily taken away. Type:audio isolator Colour:As Shown Material:Plastic+Metal Package Contents: 6 x audio isolator Due to different product batches, there may be differences in the product joints, which will not affect the use 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.