Frequently the Arcadetar is mistakenly defined as a keytar. The main difference, and peculiarity, is that the Arcadetar lets the performer play contemporaneously a guitar (using the left-hand on the sensors placed on the neck) and a keyboard (using the right-hand on the body). Nevertheless, the performer can also play with the right-hand the keyboard and use the neck to control the pitch-bend and modulation (or even other Control Changes) of the instrument.
The latter technique is more similar to the keytar's one. But, again, the remarkably long sensors (50 cm) allow the performer to modulate the sound in a much more accurate way.