[He might realize that it's on when a few noises of shock start coming out of the device on his arm.

You see, Subaru was quite confused to end up in Accumula Town's Pokemon Center instead of Nuvema Town, like he was hoping. He was hoping to see if there was a navigation or map function on the XTranseiver. But the navigation screen is smaller than what he's used to with the Hunter's navigation screen, and so he presses the wrong button, and...]

"Eh? What's this...?"