CTK-4400 | Standard Keyboards | Electronic Musical Instruments | CASIO
Casio CTK-4400 61-Key Portable Keyboard – Melodica Music Stores.
Professional 61-key Keyboard Connectors Usb 2.0 Cable Silver-plated Fit For Casio Ctk-2400 Ctk-4400 Ctk-6200 61-key Keyboard - Guitar Parts & Accessories - AliExpress