Casio CTK-491 Electric Keyboard, 61 Keys, 100 Tune Song Book, 100 Tones, 100 Rhythms, Auto Accompaniment/MIDI Compatibility, Includes Adaptor To Power The Unit or Use 6 AA Batteries (Clean Compartment), Works Great,
Best Buy: 61 KEY KEYBOARD WITH LCD, MIDI AND MIC CTK-491
Casio CTK-491 for Sale in Commack, NY - OfferUp
Casio G-shock (491 | eBay
Amazon.com: HQRP AC Adapter/Power Supply for Casio CTK-483 / CTK483 / CTK- 491 / CTK491 Keyboards Replacement [UL Listed] Plus HQRP Euro Plug Adapter : Musical Instruments
Casio CTK-491 Electronic Keyboard 61 Keys with 100 Song Bank | eBay