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Amazon.com: Casio Inc. CTK4400 61-Key Touch Sensitive Personal Keyboard with Power Supply : Musical Instruments
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1.2 - Casio CTK-4400/WK-240 Tutorial - Rhythm/ Auto Accompaniment and Save & Recall Registration - YouTube
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Amazon.com: Casio Inc. CTK4400 61-Key Touch Sensitive Personal Keyboard with Power Supply : Musical Instruments
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