Unitary electrical plug with multiple inlets and voltage converter

An electrical connecting device comprising a unitary housing, an adapter in the housing in the form of a multiple pin electrical plug for selectively connecting to different pin configurations, comprising a plurality of selectively extendable pins;

• the adapter having a shutter plate movable by a hand operated slider between a plurality of discrete positions for selecting one of said different configurations and permitting extension of predetermined ones of said pins, at least one pair of said pins being provided on a prismatic sliding member, said sliding member having guide rails, said shutter plates having protuberances co-operating with said guide rails to permit said sliding member to be exended from or retracted into said plug when said shutter member is in one of said discrete positions and to permit movement of said shutter plate into another discrete position, preventing retracting of said sliding member, when the latter is extended, an electric outlet for an electrical plug and, intermediate the adapter and that electrical outlet, an electrical voltage converter.