He flicked his wrist, the hand that had the ring on it and then in his hand appeared the handle of a tool kit.

Senku caught the weight with an oof, and set it down on the gound, before crouching to open it up and pull out what he wanted, a screwdriver, mainly.

"Granted, I can only tell you about how I know how screens like this are made. If there's some strange alien technology that's train based, I can't account for that, or magic. There's no magic in my world. What little magic I do know now, I've picked up here. But it looks just like the tech in my experience, so that means the odds that I'm right are significantly higher."