ADCOM ACE-515 AC Power Enhancer.Makes a noticeable difference in stereo audio quality with current surge protection and power-on sequencing for attached components to eliminate transient turn on/off noises.  Two amplifier high current plugs, four accessory, and one unswitched.  Secondary AC cord is for remote turn on.  If not using this feature, plug it into the unswitched outlet.I've owned this item for over 20 years and as is typical with ADCOM products, it has been a reliable work-horse.This item shows some signs of love with minor dings and scratches.  I'd rate it a conservative 6/10.Thanks for looking.