Tony chuckled. "It's the color because it emits energy in the form of light and very slight heat," he said. "It's a self containing generator. A scaled down version of the generator that runs this tower. Though, I upgraded this one before I improved the bigger original."
He let the shirt drop down and reached out, the hand that had touched his ARC thoughtfully and then pressing his palm against it, comparing the size of hers to his. The corner of his mouth twitched, pleased with what he found.
"I shouldn't need an upgrade for a while. But if I do, and need a smaller hand, I'll talk you through it. You wouldn't be the first, so don't be concerned about it if I ask. You'd be fine under pressure, even if I'm not President Doom." Tony said this matter-of-factly, because he was already certain of it. He was good at getting a read on people, and if he needed help with the device keeping him alive in this world he doubted he'd find a more suitable assistant in this world.