A:AnswerI do not have an answer to that question. I suggest checking out the Casio website page: https://www.casio.com/products/electronic-musical-instruments/workstation-keyboards/wk-245
You can also find a link to download the owners manual here: https://support.casio.com/en/manual/manualresult.php?cid=008002024&keyword= Lastly you may call the Casio Tech Support 800 #: 1-800-435-7732 during regular business hours (Monday-Friday 9:00 a.m. - 8:00pm EST)
A:AnswerThe AC power adapter is what powers the Keyboard. The AC adapter is included. The keyboard can also be powered on 6 D size batteries (not included).
A:AnswerAny song it has built in it has steps that will teach you how to play that song, and yes there is a 1/4 inch jack for speakers/headphones as well as an aux input and 1/4 input for mics. There are many songs built in but I don’t really like using the steps, mainly because the screen is at an awkward position. I would suggest using an app on your phone and but it stand its easier. The mic input has a volume knob but it’s hard to reach.