Speaker Line 35mm Aux Audio Noise Filter Ground Loop Noise Isolator Eliminate for Car Stereo Audio System Home Stereo The working principle of this noise isolator is to achieve a clear speech, music by eliminating the current noise in some car speakers, home stereo systems._x000D_ Also used with a bluetooth receiver, bluetooth hands-free car kit in your car audio system, home stereo._x000D_ _x000D_ Compatible Models:_x000D_ Works with for any portable device that has 3.5mm audio jacks, for your car audio system, home stereo, when grounding issues persist._x000D_ Colour:Black_x000D_ Material:ABS_x000D_ _x000D_ Package Contents:_x000D_ 1 x Noise isolator_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_