The Yamaha PSR-E233 premium package includes all of your must-have accessories such as the Nady HP03 closed-cup headphones, AD5 power supply and World Tour SXKS keyboard stand. Everything you need to get started as soon as you open the box is right at your fingertips. The Yamaha PSR-E233 features 385 high quality, natural sounding voices. It has 100 accompaniment styles and 102 built-in songs. Use the Portable Grand button to instantly call up an authentic stereo grand piano sound. The Yama PSR-E233 has rich Reverb effects, adding concert-hall ambience to your performance. Yamaha"s Education Suite makes practicing your favorite songs more easy than ever before. Ultra Wide Stereo Enjoy the experience of an extended, wide, dynamic sound field. Various Ultra Wide Stereo presets can be selected. Advanced Education Sweet Practice at your individual level with the new advanced Yamaha Education Suite lesson functions. Now, the playback of the selected song is continuously adjusted to the tempo of the player"s performance. High Quality Sounds In the Yamaha PSR-E233, 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 (simply?) 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 . The Yamaha PSR-E333/233 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.