Feature:1. NOISE ISOLATION: Noise isolator eliminates the buzzing noise caused by ground loops that occur when using a Bluetooth receiver with an sound source and speakers using the same power source.2. WORKING PRINCIPLE: Ground loop noise isolator immediately filters out noise by eliminating current noise for clear, uninterrupted, uncompromised sound.3. EASY TO USE: Ground loop filter noise isolator is a nice little gadget that just plugs in, plug and play, no other setup required.4. WIDE COMPATIBILITY: Loop noise isolator works with any sound device that has a 3.5mm sound jack, for your car sound system and home stereo.5. NOTE: The Ground Loop Isolator connect to the AUX Jack in car to eliminate noise.You will enjoy premium sound when use it with Ground Loop Noise isolator.Specification:Item Type: Noise IsolatorMaterial: ABSColour: BlackFunction: Noise FilterScope of Application: Suitable for Car Sound, Home Stereo System.Package List:1 x Noise Isolator1 x Manual