In order to be retrieved or transferred from a remote location by teleport, a bracelet had to be worn. The bracelets all included a communications link with their point of origin.
The Liberator bracelets could not be deactivated; if one wished to avoid an unwanted recall by teleport it was necessary to take the bracelet off.
The Liberator crew in particular were rather profligate when it came to losing teleport bracelets.
Behind the scenes
Apocryphal sources claim Scorpio's bracelets were constructed from titanium and could be directly programmed with landing co-ordinates.[source needed]