From my personal collection, purchased new in the late 1970's, here's my vintage Disco Lite, Woodstock Model 1005 is a unique collector's item. With its retro appeal and timeless packaging, it operates on standard 110-120V outlets. Adjustable on/off rotating switch with variable strobe.  Note that in the video, some of the flashes are not caught by the camera as they are too fast, so it appears sporadic.  It is not and it strobes along just fine.  My disco days are over, but yours are about to begin so do the Hustle and click the Buy-it-Now button.