Vortex manipulator

The Time Agency used wrist straps for a variety for functions. According to the Time Agent John Hart, Time Agents would bicker over the size of their respective wrist straps.

Functions

 * Vortex manipulation to facilitate time travel (DW: Utopia, The Sound of Drums)
 * Communication between users, listening to radio broadcasts, including storage of messages (TW: Kiss Kiss, Bang Bang, DW: The Sound of Drums)
 * Projection of holograms (DW: The Empty Child, TW: Kiss Kiss, Bang Bang, Fragments) 
 * Teleportation (DW: The Sound of Drums, Last of the Time Lords, The Stolen Earth)
 * Tracking of life signs (DW: Journey's End, Bad Wolf)
 * Remote control of electronic devices (TW: Everything Changes, Exit Wounds,)