[HAHAHA YEAH ABOUT THAT... he's just not going to comment on it, that's not suspicious, right??]

I usually keep it covered. If I'm not careful it can activate if I just touch something since it's a complete array. Kimblee did it so that he has to press his hands together to activate the array, but I can use mine freely. It's handy in combat, not so useful anywhere else.

[That's why it's in his left hand and not his right! See, he actually did consider that before doing something so dumb!]

Ah, actually mine's a tattoo.

[It also glows when he activates the array because anime Amestris!]