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M-Audio Keystation 61es specifications
M-Audio Keystation 61 Mk3 USB MIDI Keyboard | PMT Online
M-Audio Keystation 61MK3 - 61-Key USB MIDI Keyboard Controller with Pitch / Modulation Wheels, Plug & Play (Mac/PC) Connectivity, Free Online / App Lessons and Software Production Suite included : Amazon.co.uk: Musical