Smart Scaled Hammer Action. Reproduces the individual characteristics of each key. Speaker system with a strengthened diaphragm. Multi-dimensional Morphing AiR Sound Source. Bluetooth MIDI and Audio adapter connects wirelessly. Music Library of 60 songs. Part on and off functions. 5 Touch sensitivity levels. 18 Built-in tones and 192 polyphony. Chordana Play compatible. Two Stereo mini jacks. USB Type-B and USB-Type-A ports. Wireless use requires 6 AA batteries (NOT included). Includes: Wireless MIDI and audio adapter. AC adapter. Pedal. Music stand.