UpBright 3.5mm Audio Cable AUX In Cord For Casio CTK-2300 61-Key Arranger Piano Keyboard (6 FT 1/8″ Stereo Audio Input Lets You Hook Up Your Music Player. From Apple iPod iPhone iPad Any Music Source
PK Power 3.5mm Audio In Cable AUX In Cord For Casio CTK-2300 61-Key Portable Arranger Digital Electric Piano Keyboard (6 Feet 1/8 Stereo Audio Input Lets You Hook Up Your Music Player.