Primarily geared toward learning musicians, the PSR-E243 offers the built-in Yamaha Education Suite, which enables students to teach themselves piano as well as built-in accompaniment styles that make it possible to sound like full bands. USB TO HOST connectivity makes interfacing with personal computers and Apple iPad/iPhone/iPod touch easy. For more seasoned music makers, the PSR-E243 can also be used as a MIDI controller for computers and high performance sound sources for music software applications. The PSR-E243 offers built-in speakers featuring the Ultra-Wide Stereo DSP button that creates greater separation and a more spacious sound. It provides players with 385 voices and 100 accompaniment Styles. Extend and enhance your keyboard by connecting to your iPhone/iPad/iPod. Add virtual pitch bend, mod wheels and an arpeggiator with Yamaha's Sound Controller app. Record your children's music progress as video and MIDI with My Music Recorder. Requires optional accessory i-UX1 (#H99901), sold seperately. Additional features include a new power-saving mode and 61 full-sized keys. This affordable model also lets users play along with a band or use the dedicated Portable Grand button to instantly call-up a great sounding grand piano. Optional Adaptor (PA-3C/PA-130) sold separately.