PwrON Compatible AC DC Adapter Charger Power Supply Cord Replacement for Casio CTK-2400 CTK-4400 CTK-2090 PSU - Walmart.com
US 9V Power Adaptor for the Casio CTK-2400 Keyboard by myVolts
Homeschool Music - Learn to Play the Piano Pack (My Favorite Things Book Bundle) - Includes Casio CTK 2400 Keyboard w/Adapter, learn 2 Play DVD/Book, Books & All Inclusive Learning Essentials