Amazon.com: 9.5V AC/DC Adapter for Casio Piano Keyboard: UL Listed Power Supply Charger for Casio Keyboard Power Cord AD-5 AD-5MU AD-5MR SA-46 WK-110 WK-220 LK-43 LK-100 LK-120 CTK-496 (8.2 Ft Long Cord) :
WK-22 Casio Keyboard — Furniture Matchmaker
Casio WK-220 Electric Keyboard Grey Preowned LOCAL PICKUP ONLY | eBay
Casio WK-220 keyboard: 76 keys of goodness - YouTube
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US 9V Power Adaptor for the Casio WK-220 Keyboard by myVolts