Yamaha YPT-240 Keyboard Pack come with, Power Supply (Adapter), and Stand "Y.E.S" Lesson Functions, Connection with iPhone, iPad and iPod touch 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. Extend and enhance your keyboard experience by connecting to your iPhone/iPad/iPod. Requires optional accessory, i-UX1. You can optmize the overall sound with different EQ settings on the instrument. Tailor the overall output for optimal sound in different listening situations. Creates a stereo image wider than the speakers using Yamaha's digital signal processing technology.