Clap on. Clap off. Well, more like, Clap, pause for half a beat but no longer because otherwise it’ll stop hearing you, clap again because you waited too long, clap louder and faster, that didn’t work, clap two more times, and suddenly: on. The Clapper didn’t always work — and even when it did, it might fry your gadgets in the process — but it managed to become a big hit anyway.

On this episode of Version History, we tell the story of The Clapper, from its beginnings as The Great American Turn-On to its debut alongside one of the great advertising campaigns of all time. The Verge’s David Pierce and Victoria Song are joined by Allison Marsh, a writer and professor at The University of South Carolina, to dig into the device’s history and legacy, and to try and figure out once and for all whether this was a good product or just a great commercial.

If you want to know more about The Clapper, here are some links to get you started: