US 12V Power Adaptor for the Yamaha PSR-E333, PSR-E343 Keyboard by myVolts
Amazon.com: (Taelectric) AC Adapter for Yamaha PSR-E343 PSR-E353 PSR-E363 Portable Keyboard Power Supply : Electronics
Amazon.com: PwrON 12V AC to DC Adapter for Yamaha E343 PSR-E343 PSRE343 61-Key Portable Digital Piano Keyboard 12VDC Switching Power Supply Cord : Electronics