This keyboard totally delivers on what it promises: A huge variety of reasonably authentic instrument sounds at a budget price, for arranging and/or learning piano. The keys are velocity sensitive, meaning you get a good range of dynamics - but not weighted, so you don't get the acoustic piano feel. Built-in speakers plus audio output to an amp, sound board, or powered speaker, and/or MIDI output to computer, tablet, etc.
I bought this with arranging in mind, but now find myself not doing much arranging, and leaning more towards guitar than keys. Little used, in pristine condition. Here is Casio's product page: https://www.casio.com/us/electronic-musical-instruments/product.CT-X700/
Sweetwater's product page, which also includes a demo video: https://www.sweetwater.com/store/detail/CTX700--casio-ctx700-61-key-portable-arranger
I also encourage you to seek out other reviews or demos on Youtube, etc.