Vortex manipulator
From Tardis Wiki, the free Doctor Who reference
Vortex Manipulator
In Doctor Who and Torchwood, Captain Jack Harkness owns a device known as a Vortex Manipulator which is said that it can travel through time. In the Doctor Who episode Utopia Jack Harkness claims that he used it to travel in time but he gets the time travel wrong and he lands in the 19th century and the Vortex Manipulator burnt out and so he had to live through the 19th and 20th century waiting for the Doctor after he was abandoned by the Doctor.
Appearance
The Vortex Manipulator looks like a brown sweat band on the left wrist of Jack Harkness which can flip switches and control things for a short time. Captain Jack is never seen without it on his wrist.
