The Casio LK 110 music keyboard features 61 full-size keys. The keyboard's Key Lighting System lights up the keys you need to press when you're using its built-in lessons. Simply follow the keyboard lights to master keyboard playing at your own pace. An on-screen LCD timing indicator teaches you correct timing, and the Casio LK 110 has a Voice Fingering Guide which uses a simulated voice to call out a number, telling you which finger you use on next note when it detects that you are lagging, stopped, or playing wrong notes. Other Casio LK 100 keyboard features include 100 high-quality tones, 50 rhythms, auto-accompaniment, MIDI (5-channel multi-timbre receive), and one-key play. The LK 100 keybaord also comes with 100 Song Bank tunes ranging from children's lullabies and traditional American classics to popular holiday tunes and classical pieces. Most of the tunes are included in a song book, so you can learn to read music as you play. The keyboard's music rest gives you a place to put your song book or any other sheet music as you advance in skill.Finally, the Casko LK 110 Keyboard has a mic input, which allows you to connect a commercially available microphone for singing-along to the included songs or to songs you make up yourself.Key Lighting System (on/off)61 full-size keys12-note polyphony (maximum)100 high-quality tones50 rhythmsAuto-accompanimentMIDI (5-channel multi-timbre receive)One-key playComes with music rest.