Noise Isolator, I3C Ground Loop Noise Isolator Filter for Car Audio System Home Stereo Laptop DVD TV MP3 with 3.5mm AUX Audio Cable (Black) PERFECT NOISE ISOLATOR: With this ground loop isolator, you will never worry about noise! It can completely eliminating the buzzing noise caused by ground loops in car speakers and home stereo systems. MULTI USE: Applicable for any portable device with 3.5mm audio jacks, also can be used combining the bluetooth receiver kit in car audio system or home stereo. High Quality: Made of high-purity oxygen-free cooper, so it will not affect the signal transmission no matter how the wire is twisted. DURABLE: Made from durable plastic, The ground loop noise isolator can work for long time, wear-resisting and corrosion resistant. PORTABLE: Very lightweight, mini sized, taking little space, can be easily taken away.