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Amazon.com: HQRP AC Adapter/Power Supply Cord for Roland HP-503 / HP503 / KF-7 / KF7 Digital Piano plus HQRP Coaster : Musical Instruments
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UPBRIGHT NEW Global AC / DC Adapter For Roland HP-503 HP-504 HP503 HP504 Digital Piano Power Supply Cord Cable Charger Mains PSU - Walmart.com
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