Description: The noise isolator is designed to completely eliminate the annoying humming / buzzing noise caused by ground loops. It improves the audio, music, speech quality with ultra simple operation, just plug it and go, no external power or battery required. Ultra compact size, exquisite workmanship and delicate quality, elegant shape, easy to be carried anywhere for multiple useification: Type: Ground Loop Noise Isolator Material: ABS Color: Black Application: Motorcar horn / home sound system Audio Interface: 3.5mm Isolator Size: Approx. 6*2*2cm/2.4*0.8*0.8inch Weight: Approx. 34g / 1.2ozPackage List: 1 * Ground Loop Noise Isolator 1 * 3.5mm Audio CableNote: Only a ground loop noise isolator and a cable included, no other stuff.