Casio AD12M3 Keyboard Adapter 12V Adapter for CTK 5000, WK 500 / 3300 / 3800, CDP 100 / 200, PX 120 / 320 / 575 / 720 The AD12 adapter is designed specifically for Casio's WK series and Privia model instruments. Extend your battery life by using this optional AC adapter while you're at home or...