Fangrui Product Details [portable Bt Midi Keyboard]you Can Connect It Wirelessly To Your Device With Bt, Or Use Usb Midi To Transmit Midi Data Between The Two, Which Can Easily Slip This Ultraportable Midi Keyboard Into Almost Any Bag And Take It With You To The Studio, Caf Or Hotel To Compose Music. [intelligent Automatic Accompaniment]professional Dynamic Keyboard You Can Play Essential Bass Lines, Melodies, And Leads With Ease Thanks To Intelligent Dynamic Scale Mode, The Scale Tones Enable You To Switch Between Many Musical Genres. If You Enable Intelligent Dynamic Scale Mode, You Wont Have To Be Concerned About Tuning Issues When Arranging. [functional Area] Usb Midi Keyboard Can Turn On Or Off 25 Velocity-sensitive Keys, 8 Rgb Backlit Velocity-sensitive Pads, 8 Assignable Rotary Encoders, 2 Touch Strip Pitch Bend And Vibrato, Octave, Transpose, Arpeggio, Note Repeat, And Chord Functions Allow You To Create The Music Clips You No Restrictions On Places. [oled Screen Display]the Midi Keyboard Controller Has A Straightforwa