Mark IV Power Armour consists of four parts: the helmet, which features a comm-link and a targeter system among other things; the torso and shoulder plates, which feature such things as a life signs monitor; the groin and legs, which include gyroscopic stabilisers; and the backpack power unit, containing a miniaturized sub-atomic power plant. The armor is totally enclosed and self-sustaining, allowing for operation in almost any climate for extended periods at a time.