Awesome well featured mid 1980s Vintage Casio Casiotone MT-100 Keyboard Synthesizer with useful Graphic EQ - it is Working and has been Tested!

Lots of pics added so you can reviews, but it’s got chord and bass line accompaniment selectors ( this creates the legendary / goofy electronic sound these are loved for ) , six buttons for 22 different rhythms, classic fill in and synchro ( tap it in?) 10 tone buttons for 20 sounds - sustain, “reverb” and 2 vibratos / and GRAPHIC EQUALIZER” with 5 bands - apply to all or just the solo instrument. Adds a lot of control.

On the back is a tuning knob, RCA Jack output, 1/8” headphone Jack and plug for a 7.5 volt power adapter (NOT INCLUDED, we recommend getting one of those multi adapters - consult online guides, Casios usually take “center negative.”

We operate it on FIVE “D” batteries, NOT INCLUDED!)

Works great, lots of fun, smaller portable fun machine.

Oh, yeah keys are “midsize,” white about 3 1/4” long

This description proudly written by a human!