Casio Keyboard CTK-651 Compatible Power Supply Plug Charger
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Amazon.com: Replacement Casio DC 9V / 9 V Volt Adapter Power Supply Cord and plug AD-5, AD-5E, AD-5MLE, AD-5MLE-TC1, AD-5MR, AD-5EL, AD-5MU, AD-5GL for Select Casio Keyboards / Digital Piano / Synthesizers: