This is the full-sized keyboard with 61 keys that illuminate to teach you which notes to play. Its 60-song repertoire comes with 400 high-quality tones, 100 rhythms, and 100 presets. The free Chordana Play app allows you to use an iPhone/iPad or Android to work with the keyboard’s lighted keys to learn songs and download MIDI files. It also provides a voice fingering guide with simulated voice. Digital effects add reverb for more depth and breadth. Its keys provide two sensitivity levels and 48 polyphony. With headphones output and AC adapter (or requires six AA batteries). 3 1/2" H x 37" W x 12" D. (8 lbs.)