HQRP AC Adapter / Power Supply compatible with Casio CTK-530 / CTK530 / CTK-531 / CTK531 Keyboards Replacement plus HQRP Euro Plug Adapter - Walmart.com
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Casio CTK-530 Touch Response 61-Key Keyboard, Hobbies & Toys, Music & Media, Musical Instruments on Carousell
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File:Casio CTK-530 Portable Keyboard.jpg - Wikipedia