Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Roland AX-7 is a keytar that was manufactured by Roland Corporation from 2001 to 2007. This modern instrument contains many more advanced features than early keytars such as its predecessor, the Roland AX-1, and the Yamaha SHS-10. It runs on 6 AA batteries or an external power source. It has a 45 velocity sensitive keys (without aftertouch), and a 3-character LED display. Several features aimed towards stage performance are present, such as a pitch bend ribbon, touchpad-like expression bar, sustain switch, and volume control knob, all on the upper neck of the instrument. There is also a proprietary "D-Beam" interface, made up of infrared sensors that detect nearby motion.