VIDEO: CT-S1 "Keytar" - CT-S1 - Casio Music Forums
Casio AZ-1 - Wikipedia
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MATRIXSYNTH: CASIO AZ1 Keytar
37 Keys Keyboard Piano with Microphone, Slimline and Super Compact Portable Guitar Electronic Organ, Mini Keytar, Beginner, Education, Musical Instrument (BF-3755, Red) : Amazon.de: Musical Instruments & DJ
Casio AZ-1 keytar very well maintained and fully working condition | eBay