Initially, I noticed a significant reduction in the "volume blasting" of TV commercials and background music. I have a hearing problem that makes loud noises painful. Set-up was accomplished in less than three minutes. Although not perfect, not quite as effective with high frequency sounds, it worked well at first. One month later, it stopped working altogether.My money would have been just as well spent had I flushed it down the toilet. Some lessons are learned for free, others cost a few bucks.Substandard components? Caveat emptor!NOT RECOMMENDED!