With a versatile range of sounds and functions, the YPT-240 is the ideal instrument for aspiring musicians who are just starting out. Featuring unique Ultra Wide Stereo technology for a wide stereo image and great sound, this keyboard also offers onboard lessons that make learning music easy, and more importantly, fun! AC Adapter sold separately. TheYamaha 61 Key Keyboard features: Y.E.S. - Yamaha Education Suite - Practice at your individual level with the Yamaha Education Suite lesson functions. Now, the playback of the selected song is continuously adjusted to the tempo of the player's performance. 385 high-quality instrument voices and 100 accompaniment styles. It features a wide variety of voices, including preset digital effects. Grand Piano Sound - Enjoy Yamaha's world-famous grand piano sound The Portable Grand button instantly recalls a great sounding piano "covering" the keyboard's full range. Eco Friendly Mode - a function that turns off the power automatically if the keyboard has not been used for a set amount of time in order to avoid using power unnecessarily. Runs on 6 "AA" batteries, not included.