Amazon.com: MaxLLTo 6ft Extra Long AC Power Replacement Adapter for Casio WK-110 WK-200 WK-210 WK-3700 Keyboard Charger Power Supply Cord : Musical Instruments
This is great! Casio WK-3700 synth keyboard with DSP and ZPI processor - YouTube
Casio 76-key keyboard wk-3700 for Sale in Elk Grove, CA - OfferUp