Be sure to add me to your favorites list Casio CTK-451 CTK-471 Digital Piano Keyboard Owner's User's Operating Manual This is scanned and then printed paper hard copy reproduction version of the user's / operation manual for the CASIO CTK-451 and CTK-471 digital piano electronic keyboards. It is in like new condition and is complete and very helpful. This booklet has been bound with a plastic comb type binding. These models are two of Casio's very nice midi digital keyboards, and you need the manual to get the most out of it! This is the ENGLISH manual only, and does not include the Spanish section. This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thank you so much for looking! Thanks for looking! Check out my Store!