[Ground isolation module eliminates current sound]could help you to reduce the noise from the car&home audio electric system, gives you HiFi quality sound output. ly solve car and home stereo noise problems. [Plug&Play Design]The Audio Isolation Transformer Alternator is easy to install, don't need any complicated tools, and it can be used after correct connecting and cable White and Red. Kind remind please confirm whether the product is suitable before buying. [HiFi Performance]The Ground Loop Audio Noise Eliminator could work with car stereo, amplifiers, speakers or mixers, with stable performance, high precision and good reliability. Let you car speakers / home stereo systems humming sound away and enjoy a sound [Multi device compatibility]Suitable for the connection between electronic devices and playback sound effect devices, such as the connection between laptop DVD/TV/CD player and speaker, and also suitable for the connection of car AUX audio [Alloy shell gold-plated interface]Made of alloy shell material, with high hardness and durability, the gold-plated interface is to oxidation, rust and interference, and the signal transmission is more stable Colour:As Shown Material:plastic Package Contents: 3 x audio isolator(Due to different product batches, the appearance , which does 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.