"... with a device that can fit in her hand" and no photo of the device. Yet, another example of bad/poor effort science reporting. The structure of this article looked like an 17 year old copied and pasted some shit from google and performed some really bad unit conversions. His/her editor should be ashamed of such a POS article.

Device in question: https://idw-online.de/de/newsimage?id=42938&size=screen