The amount of stimulation which is sent,
Glee Seasons 1-5 DVD Box Set , is based on volts,
Game of Thrones Seasons 1-4 DVD Box Set, current, and time. Although the intensity and duration can be manipulated by the owner,
Garfield Complete Series DVD Box set, the electrical energy which is required to power the collar remains constant. A major concern is the lack of regulations determining performance characteristics or reliability of the shock collars.