The Casiotone CT-FS1 is available now for $399.99 in a monochromatic black or white version where even the 61 touch-responsive keys are all the same color. It can run on AA batteries or a power adapter but at just under 10 pounds in weight it’s definitely not the smallest of portable keyboards. There’s built-in stereo speakers and Bluetooth connectivity if you’re playing for others, as well as a physical headphone jack.
The keyboard’s most compelling feature is what Casio calls its…
