The PSR-E400 series is an excellent all-round 61-key keyboard that is ideal as a starter instrument but also represents a robust alternative for experienced players. The latest PSR-E473 features a newly developed tone generator that delivers stunning improvements in sound quality as well as high quality effects such as delays. 820 Voices and Super Articulation Lite Voices 290 Styles 2 channels/41 types of DSP insertion effects Quick Sampling Groove Creator Live Control Knobs, Motion Effect functionality, pitch bend wheel Mega Boost Direct Category Access buttons USB Audio Recording/Interface Mic input and vocal effects Individual L/R outputs.