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RR1 spell checkerModel: RR-1 spell checker
Battery: 4 x AAA
              
AC adapter:
Year: 1981
                        
Chip:

Info: 


 

RR 2 spell checkerModel: RR-2 spell checker
Battery: 4 x AAA
              
AC adapter:
Year: 1989
                         
Chip:

Info: 


 

silly sound stageModel: Silly Sound Stage
Battery: 4 x AA
                
AC adapter:
Year: 1994

Chip:

Info: made in China


 

Spell & MathModel: Speak and Math 1v   
Battery: 4 x 1,5 C

AC adapter: AC9199
Year: 1981

Chip: TMC0270/CD2704, CD2801, CD2392, CD2393

Info: 1 series red logo on the left



 

Spell & MathModel: Speak & Math 2v   
Battery: 4 x 1,5 C

AC adapter: AC9199
Year: 1986

Chip:

Info: 2 series red logo on the right