The KA90 is a digital arranger piano with 88 graded-hammer keys and 128-note polyphony in a portable stage-piano-style cabinet. It features 20 factory presets and a wide range of acoustic and electronic sound selections such as acoustic pianos, electric pianos, organs, guitars, and orchestral string instruments.

With 50 pre-recorded styles to play along with, the digital piano offers front-and-center control panels with easy access to all system functions including Sound Selection, Styles, Split, Transpose, and Effects such as Reverb, Chorus, and EQ. With the easy-to-use song recording features you can record your own keyboard performances as a user song, and the keyboard allows up to 5 user songs to be recorded and stored in internal memory.

Furthermore, the KA90 has a detachable music stand, and the cabinet features a built-in 4-speaker 60W sound system. Some other features include two headphone outputs, a USB port for connecting to/from a computer sequencer, a MIDI out, and a stereo 1/4" in/out jack for connecting to external amplification, and external sound sources. A sustain pedal and a DC 12V external power supply are also included.