Bubs's Keytar

From Homestar Runner Wiki

Bubs' Keytar is a Yamaha SHS-10 FM digital keyboard. The most common version of the SHS-10 is red and features many-coloured buttons.

It was considered to be the cheapest midi-controller at the time in the late '80s. At around $100, it was almost a toy-synth, but had professional features like midi out, a pitch-bend, and a two-digit LED display.

It debuted in the Strong Bad Email "cheatday." Bubs has it handy behind the couch in Strong Bad's basement so he can help supply the music for "The Date of Birth Song".