They're -- different, depending on what the person did to earn them. [ ohhh, so very heavy. it has been a long, long day. ]
Some people have them because they -- had sex, even though it's against the rules. Their collars are temporary, and they get shocked when they get too close to other inmates. Other people have them because they... hurt someone after arriving here, and their collars shock them if they try to do that again.