midiplus EK490 49-Key Midi Controller 49 velocity sensitive piano-style key. MIDI keyboard Built-in Sound and style MAXIMUM POLYPHONY: 64 notes 128 GM sound built in USB powered works as MIDI keyboard controller DISPLAY: Blue back lit LCD 64 styles with variation Pitch and Mod wheel MIDI input and out jack : USB B Type, AUX OUT , Headphone, MIDI IN, MIDI OUT, SUSTAIN POWER SOURCE: USB (no speaker sound), DC 9V, Batteries ATTACHMENT: Owner's manual, USB cable made in Taiwan