How do you think the Pinger will act? And what the @#@!# is up with its name?
Teaser vid: http://www.gamesas.com/gallery/trailers/crysis_2_pinger_stinger
I'm guessing that if it's giant awesome-laser-eye touches you, something pings sort of like a radar then it starts spamming missiles at you.
Or, maybe it gives the command you give the suit lots of ping. So, you try to change to Power or something but it takes 5 seconds.