Korg model #500405015300 KA310 power supply AC to DC Adapter
This is the original manufacturer's part, not a substitute. This part is the transformer and the cord that plugs into the keyboard. There is another cord that plugs into the transformer and then goes to the AC outlet on the wall (this cord is not included). If you need both parts you can find the AC power cord (pictured below) either by searching for "Korg AC Power Cord" or by going here
AC adapter for X50, MicroX, R3, MR-1000
12V,500mA: KA-310 or KA310
Audio-Depot usually keeps this and many other parts in stock. There is not enough time in the day to list all of the products and parts we carry online, so if you don't see what you are looking for email or call us toll free at 888-251-2002.