I believe you're visible even if it doesn't proc.
"I used to make diddly squat, but I've been with the company for 16 years and have had plenty of great raises. Now I just make squat" -- Me
Pediatric brain tumors are the #1 cause of cancer related deaths in children.
If it procs, it breaks stealth.
If it does not proc, it does not break stealth.
I removed mine since I liked to use it while stealthing.
A simple question: if I slot the IO Shield breaker proc (chance for dmg) in surveillance and it procs, does it make me visible from stealth by cloaking device, since the mob is taking dmg?