He XPRESS KEYBOARDS generate the sounds of three legendary classics, which to this day have not lost an ounce of their popularity. Each instrument represents a milestone in music history: B4 XPRESS produces the sound of the legendary B3 drawbar organ including rotary speaker. PRO-53 XPRESS generates the sound of the beloved Prophet-5TM analog synth. FM7 XPRESS delivers the modern and digital sound of the famous FM synths of the 1980s.