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Amazon.com: Donner Mini MIDI Keyboard, N-25 25 Key MIDI Controlle with Velocity-Sensitive Mini Keys&Light-up Rocker and Music Production Software Included, Small MIDI Keyboard with 40 Free Courses : Musical Instruments
PocketPiano The first professional full-sized portable piano
Pocket MIDI - Apps on Google Play
Pocket Sequencer MIDI Sequencer
USB MIDI Controller with Keyboard 25 Keys Plug Studio Pocket Key 25 : Amazon.co.uk: Musical Instruments & DJ