English: A woman in Paris around 1922 listening to a tiny crystal radio mounted on her parasol. Radio broadcasting had just begun around 1920, setting off a "radio craze" in the early Roaring 20s. The powered radios of the time, which used vacuum tubes, were large and cumbersome, but the small cheap crystal radio could be carried and shown off as a high-tech marvel. As novelties, experimenters built tiny crystal radios into umbrellas, finger rings, pocketwatches, walking sticks, pipes, and garters. The radio is visible mounted at the center of the parasol behind her head. The antenna wire is strung on the parasol. Because crystal radios run off the power of the radio waves they receive, they cannot drive loudspeakers, so she wears earphones to listen.

Caption: "WIRELESS ON THE PARASOL IN PARIS The wires serve as antenna, so the apparatus is altogether portable."