The Zeroids Robots were battery operated, and had wheels with rubber treads to propel themselves across the floor. There was a bottom mounted reversing switch that would allow the robot to reverse when it touched a special plastic plate, or turn the robot off, when in backed up into its display case.
Zerak, the blue robot, was originally the "commander" of the three robots. Zerak came with hook hands, and interchangeable magnetic hand and a throwing cup hand. Zerak's right arm could be cocked, and made to throw objects.
Zobor, the "Bronze" Robot, could "transport" lightweight items in his storage case, which could be "transformed" into a wagon due to having wheels attached to it. The case/wagon could be latched to a hook on Zobor's base. Zobor had a throwing arm and special spring-loaded plier type clamp hands.
Zintar, the silver "explorer", could use his storage case as a sled-like vehicle, which was propelled by his own treads. Zintar had a throwing arm and special hands with spring-loaded opposable thumbs. Zintar was cast in both a silver sparkled plastic and also in plain light gray plastic.
Zogg, a green robot was added to the set, and replaced Zerak as the commander of the zeroids. Zogg had powered drive treds, and was the first zeroid with an internal light bulb. Zogg did not have a throwing arm. Zogg had a sophisticated-looking "station" which had movable parts, activated by Zogg's metal "hands" completing an electric circuit. The station had, among other things, a "radar" that would rotate, and a spiral design 'monitor" which would spin when Zogg would complete the electric circuit.
Source: internet, My Collection - Updated 01-14-2016