The Roberts Rambler is a transistor radio. The first batch of Ramblers built in 1975 had oblong push buttons and large knobs, and then around a year or so later they were updated with round push buttons with chrome caps and smaller knobs but internally they remained much the same. The Rambler continued in production for nine years and was then replaced by the Rambler II in 1984 which had two integrated circuits in place of the 8 silicon transistors in the Rambler.