Features 1、Common Ground: Common ground means that the grounding points of the two electrical appliances are not at the same point. Due to the difference in grounding resistance, noise is transmitted into the electrical equipment through the ground wire, causing interference and common ground noise. 2、Eliminate Buzzing Noise: Noise isolator eliminates hum noise caused by ground loops when the sound source and (some car speakers, home sound systems) use the same power source to enjoy clear music. 3、Plug and Play: The ground loop noise isolator is easy to use, just plug and play, no batteries required, small and portable, this gadget doesn't take up much space and is easy to take away. 4、Noise Reduction: The 3.5mm loop noise isolator can only eliminate noise and current noise caused by products with common power and ground, but cannot eliminate noise caused by other reasons, so you need to confirm the source of the noise yourself. 5、Pure Sound Quality: The car sound ground loop noise isolator has no rock damage, giving you a better experience and can be used on mono. Specification Item Type: Ground Loop Noise Isolator Material: ABS Interface: 3.5mm Applicable Field: Noise Reducer Package List 1 x Ground Loop Noise Isolator 1 x Manual