Features: 1NOISE 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. 2WORKING PRINCIPLE: Ground loop noise isolator immediately filters out noise by eliminating current noise for clear, uninterrupted, uncompromised sound. 3EASY TO USE: Ground loop filter noise isolator is a nice little gadget that just plugs in, plug and play, no other setup required. 4WIDE COMPATIBILITY: Loop noise isolator works with any sound device that has a 3.5mm sound jack, for your car sound system and home stereo. 5NOTE: 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. Item Type: Noise Isolator Material: ABS Colour: Black Function: Noise Filter Scope of Application: Suitable for Car Sound, Home Stereo System Package Included: 1 x Noise Isolator 1 x Manual