What the Hell Is That ?!?!?

These are the two types of button battery most used in my household. I bought them at the flea market because everybody knows that the hands of underfed prisoners and/or children make better batteries, because they're so small. (Yay! Olympics! Look the Other Way, USA!)



But then I noticed this:


WTF?!? I want a "Cellular phone call detector watch" Because what if I can't see hear or feel my call alerts in my actual phone?