Typically, a MIDI keyboard is available in 25, 49, 61 or 88 key versions, but nearly all feature an octave shift button so you can access a full-range of notes. Some models will also feature an extra 'MIDI IN' or 'MIDI OUT' port for connection to external hardware such as synthesizers.

Today, nearly all MIDI keyboards will connect your computer via USB connection. Instead, MIDI keyboards need to be used in combination with a computer and software instruments, or external modules to generate sounds. MIDI Keyboards looks much like a traditional musical keyboard, but do not generally have sounds built in of their own.