Features: Brand new and high quality When using a Blue receiver, the buzzing caused by the ground loop is completely eliminated when the audios source and the speaker use the same power supply in some car speakers / home stereo. The noise isolators works by providing clear speech / music by eliminating the current noise in some car speakers / home stereo For any portable device with a 3.5mm for your car audios system / home stereo when grounding issue persist. It can also be used for Blue receiver / Blue handsfree car kit in car audios system / home stereo. Compact and lightweight, this gadget does not take up too much space, and can be easily taken away. The ground return isolators is connected to car to eliminate noise. When using a ground loop noise isolators you will enjoy high quality sound. Specifications: Material:ABS Length:Approx.59mm/2.32inch Package Includes: 1x Ground Loop Isolators note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.