Yamaha PSR-E323: Great sounds, MIDI sockets and make sure you use sustain! - YouTube
YAMAHA PSR e323 (first 3 demo songs) - YouTube
Yamaha PSR-E323 - Wikipedia
Yamaha PSR-E323 61-Key Portable Keyboard With Stand | eBay
Amazon.com: AC Adapter for Yamaha PSR-E323 PSS-35 PSR-40 PSS-80 Keyboard Power Supply Cord, Guy-Tech Compatible Replacement 4 Feet, with LED Indicator : Musical Instruments