The Music Masters Discount Electronics MORE! You are looking at... Item: Car Stereo Radio Audio Amp Power Wire Engine Noise Filter Suppressor Isolator Condition: New Factory Specifications: ? In-Line 10 Amp Power Wire Noise Filter/Suppressor ? Designed to Eliminate Engine Interference ? Used w/Head Units, EQs, Small Amps, CB Radios, Scanners, etc ? Installs In-Line to Units 12 Volt Power Cable ? Separate Isolation Ground Wire Comments: This is an effective way of reducing engine noise in car radios and other 12 volt systems along with filtering the power supply. It installs in-line between your 12 volt "hot" power source and the power wire of the head unit. It also has a separate ground wire to help make it work more effectively. Static, engine noise, and other interference can often be introduced when installing aftermarket accessories. This can help to reduce and/or eliminate those problems. Keep in mind that "engine noise" can come from a number of sources and is directly relative to the quality of the overall installation and the equipment used. This is often a low-cost solution that overcomes many of these problems but does not always work in every situation. It's a very easy fix and always worth a try since it's a very simple install. We have been using these for years with much success. If it doesn't work for you we are always happy to take it back for a refund so you have nothing to lose. Please note: This is NOT for large power amplifiers as it does not have heavy-gauge input/output wires. It is suitable for smaller amps but primarily is used for car stereos, CB radios, scanners, along with a variety of marine electronics, etc. Thanks for checking out one of our items! Please take the time to look at everything we have up for sale and check back often. You never know what you will find. We have been in business for 30+ years and can best be described as "An old school stereo shop and electronics store with a modern twist". We always guarantee your satisfaction and promptly take care of our customers. Shipping Handling for this item is FREE everywhere in the United States. For international shipping not listed contact us for approval and a shipping quote. Thanks again for looking and as always your business is appreciated!