Just like you should put 2 and 2 together and realize you have the gayest avatar ON PLANET EARTH. Just kidding...oh and it's a heart monitor.
I have to say I find it really odd that no ones has gotten this right yet. I believe it's what you call a heart rate monitor. This must confuse some Cotto haters though, as they claim he doesn't have a heart.
during a fight, it rates your heart to see how good you did....like for example... "yo, that ni99a got heart" or "**** that *****, i would rather die in the ring... he aint got no heart" so when he wears this, he can actually tell who's saying what, and when....
I think it has something to with with the heart and I guess it monitors some sort of rate that deals with the heart. As far as what that rate is that it actually measures? No ****ing clue. Technology is so complicated these days.