The Yamaha PSR-E423 portable keyboard offers several innovative features. This includes the basic features for learning to play, such as the Yamaha portable grand button (which instantly resets the keyboard to the finest onboard piano settings) and the Yamaha Education Suite buttons (which include built-in songs and 7 levels of lessons). In addition, the Yamaha PSR-E423 has features for when it's time to perform, such as synthesizer control knobs for realtime control of the filter, effects, sound envelope, and style tempo. The Yamaha keyboard's arpeggiator provides 150 different patterns and 40 arpeggio voices. Along with its black body, these easy-to-use, professional features set this 61-note keyboard apart from others in its class.