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BERLS 9V Power Supply Adapter for Casio Piano Keyboard CTK Series CTK-120 CTK-330 CTK-491 CTK-515 CTK-551 CTK-630 CTK-700 etc. - AliExpress
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Amazon.com: MaxLLTo AC Wall Power Supply Adapter 9V, MaxLLTo AC 100-240V to DC 9V Transformers, 1 Amp, 2.1mm X 5.5mm Charger Cord for Roland Boss DB-90 DB90 Metronome Dr Beat Wall Charger
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