Model: RR-1 spell checkerBattery: 4 x AAA AC adapter:Year: 1981 Chip:Info:
Model: RR-2 spell checkerBattery: 4 x AAA AC adapter:Year: 1989 Chip:Info:
Model: Silly Sound StageBattery: 4 x AA AC adapter:Year: 1994Chip:Info: made in China
Model: Speak and Math 1v Battery: 4 x 1,5 CAC adapter: AC9199Year: 1981Chip: TMC0270/CD2704, CD2801, CD2392, CD2393Info: 1 series red logo on the left
Model: Speak & Math 2v Battery: 4 x 1,5 CAC adapter: AC9199Year: 1986Chip:Info: 2 series red logo on the right
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