While based on the same design principles, this suit's matrix was formed non-collapsible to increase its protection from the rigors of deep space; also, its specialized nature made collapsibility unnecessary. Power was provided by a Mk IV micro-nuclear supply pack, supplemented by solar power converters. Systems were controlled via a cybernetic interface, though it proved to be overly sensitive; when Stark first used the armor he had difficulty triggering the appropriate command to activate the feature he wanted. The suit was designed for extended time outside of the atmosphere, up to two days in orbit (food and catheterization capable). The life support, boot jets and altitude maneuvering were powered by an on-board supply of liquid oxygen. Weaponry consisted of palm-mounted third-generation "repulsors" (electron beams which require laser ionized path of air to travel through the atmosphere; the beam is moderated using a pulsing beam and early form of adaptive optics; objects are jolted away from the beam path by the combination of ionized air and the accelerated neutron beam) and a chest-mounted "Unibeam" (a variable intensity light source usable as a spotlight or a laser; the pentagonal shape of the emitter allowed for more accurate laser pulsing while in an atmosphere), and epaulet-mounted concussion-burst cannons. Sensors consisted of radar, sonar, infrared scanners, and radio. Additional features included ECM against radar and sonar, and the fully articulated hands could be fired out on retractable cables for use as long-range grapples. The most obvious feature on this special armor was its ability to attain escape velocity without aid of an external thrustier, unique to this Iron Man version; however, the nuclear jets which allowed this made the suit bulky, heavy and awkward in Earth's gravity. The dangers inherent in an atomic-energy based propulsion system of such immense power seem to have driven Stark to build the thruster unit which he has been using ever since.