the car inside the car on the car Stereo power caused by noise, but also can effectively inhibit the computer display Can effectively solve the problem of car Stereo noise, the ignitions of the power supply clutter have a filtering effect, so that the sound better. The Stereo Isolation Alternator is easy to install, and it can be used after correct connecting cable. The Ground Stereo Noise could work with car stereo, amplifiers, speakers or mixers, with stable performances, high precisions and good reliability. Used for portable devices that have Stereo outputs Home Stereo Speakers Amplifier Equalizers and so on. (The product is slightly different from the picture, which does not affect the use) Color: As Shown Material: Metal+Plastic Package Contents: 1 * Ground noise isolator 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.