From the maker of upscale power cords, noise eliminators and audio fuses. Place this passive device on top of a piece of your audio equipment, preferably over power supplies, to reduce electronic, magnetic and radio frequency interference in your system.No moving parts. Will not wear out. It has loose particles inside of it that make noise when you shake it. This is how it's made. I hear some difference, *in my system*. Some people report greater effects, see below. Your mileage may vary. "The audible effect is startling. The net result for me has been a greater ease in the sound of the music, with an increase in my enjoyment and time spent listening." Stereo Times. "The overall effect was less grunge, more music." Six Moons Audio Reviews New $225. Item is like new. I have 690 ebay transactions @ 100% so, buy with confidence.
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