The sound comes from Ben 10, the Cartoon Network animated series that began in 2005 and follows Ben Tennyson, a boy who uses the Omnitrix wrist device to transform into different aliens. The ready signal is part of the device's interface, telling Ben and the audience that a transformation is available. As clips from the show spread through edits, memes and soundboards, the short cue became shorthand for getting powered up. It remains popular because it is instantly recognisable to viewers who grew up with the series.