Function: Main controls, power, transposition keys, single main keyboard for playing.

Functions: Designed for advanced players, ideal for two-handed practice and left-hand play. Must be magnetically attached to the main keyboard to use.

Function: Need to be magnetically attached to the main keyboard to work. They let you play drum machine rhythms and block chords, with each key triggering different scales at the top, middle, and bottom sections. Perfect for beginners to practice on.

Function: Connects to the main keyboard via cable for sound playback without needing a Bluetooth device. It includes a MIDI protocol interface and a sustain pedal jack, with one-touch sound switching.

Function: Protects the keyboard, easy to carry, and the creative touch is that you can turn on the main keyboard's power from the outside, revealing its colorful glow.

Function: Designed for players with piano experience, it extends the duration of notes. Requires a wired connection to an external speaker for use.