Portable 3.5mm AUX Audio Noise Filter Ground Loop Isolator for Smartphone Devices by Cellet - Retail Packaging - Black CONVENIENT, portable size. Just plug it in and enjoy sharp, clear audio through your car speakers or computer. Small and unassuming enough that it stays quietly in the background doing its job. ELIMINATES background humming, hissing, white noise, static and buzzing due to ground loop issues. Keeps your audio silent when nothing is playing, and even clearer when something is, without compromising sound quality and listening pleasure. DC Blocking Capacitor filters DC current in signal path. UNIVERSAL 3.5mm female to male design plugs in with no need for batteries or power VERSATILE- Use it to get better performance and experience when hooking up your amp to your computer, playing audio in your car through the AUX port, Headsets, Bluetooth adapters, subwoofers, XM radio, DVD player, and more. HASSLE FREE warranty- guarantees your satisfaction with a 3 year worry free manufacturers limited warranty