The Crystal Focus is a gold collar with a small heart shaped lock and 2 keys. The locking mechanism is simple and seems utterly insecure, however, the lock will only open if the attempt is made by the owner.
The collar allows the owner to be aware of the state of the one in the collar at any time, including their location. While wearing it the collar makes the owners commands sound more reasonable, more like they should be followed. The wearer also can feel the presence of the owner and as time progresses it seems more and more like that feeling has always been there. Then, if enough time passes, the feeling of awareness becomes more mandatory and causes extreme anxiety the longer the wearer is without it.
It cannot be removed by the wearer alone.