Isolate and eliminate noise caused by grounding rings 4 channels, consisting of two pairs of stereo (L+R) inputs and outputs Easy to install, strong and The connection is , smooth and non-. that the shield ground on each audio cable is isolated from the ground of any equipment. perfect match with the original car Made of high-quality ABS High-quality wires, safe and environmentally friendly, strong stability, long service life Eliminate buzzing caused by ground loop problems. Filter out the DC current in the signal path. Multiple connectors, more versatile Applicable models: for most models on the market Colour: blue Material: ABS Size: 12 x 9cm Package Contents: 1 x Audio filter Only the above package content, other products are not included. Note: Light 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.