Yamaha YPT-230 Keyboard w/ AC Adapter More Advanced Y.E.S 6 - Practice at your individual level with the new advanced Yamaha Education Suite (Ver.6) lesson functions. Now, the playback of the selected song is continuously adjusted to the tempo of the player's performance. High Quality Voices & Styles and Digital Effects In the YPT-230, You will find 385 high-quality instrument voices and 100 accompaniment styles. It features a wide variety of voices, including preset digital effects. You will also find preset dual voices, like e.g. Piano plus Synth Pad, so you can easily enjoy beautiful rich sounds. Portable Grand Button Enjoy Yamaha's world-famous grand piano sound The Portable Grand button instantly recalls a great sounding piano covering the keyboard's full range. Auto Power Off mode - This is a new, eco-friendly mode. The YPT-230 comes with 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. This supports long battery life when used as portable with option of 6 AA batteries. Dimensions Width 945mm (37-3/16) x Height 118mm (4-5/8) x Depth 348mm (13-11/16); Weight 4.5kg (9lbs., 11oz.)