Energy shackle

An Energy Shackle is a piece of Covenant technology used to restrain an individual.

Design details
Energy shackles are small purple devices that form a ring of blue energy around itself with the ability to restrain an individual. The device levitates in a fixed position using some sort of anti-gravity technology and is very difficult to move. The device also has the ability to electrocute the restrained individual.

Appearances

 * Halo 2
 * Halo 2: Anniversary