Katie gestured to a pair of ring-shaped objects about the width of her hand, nestled in a large machine with a digital number display in the centre, currently reading "0000". The rings had a similar number display, also reading four zeroes.
As they walked over to examine the machine, they noticed that the rings were adjustable, almost as if...
"They look like some kind of fancy wristwatches", said Tiff.
"Pretty weird to have a charger this huge for a watch though", said Katie, as Tiff took one of the rings and slipped it onto her wrist, adjusting it to fit.
"They're totally fancy watches", said Tiff. "Look, there's even a little wheel to set the time..."
"Tiff, be careful!" cried Katie. "You don't even know what..."