Detection Tool

“How about you use the simple detection tool provided by Judgment? It’s the thing you can connect to the lower connector on your phone that acts as a sensor and puts together data on the composition of the air and whether there are harmful electromagnetic waves there.”

“Hm?”

“We all underwent training on how to use it the other day, remember!? Or does someone with top grades in a high class school have the ability to sleep through lessons, too!?”

As Uiharu squealed an explanation at her, Shirai followed the instructions and attached an unfamiliar device to her phone.

Toaru Kagaku no Railgun SS2, Chapter 5, Part 3