Generic Compatible Replacement AC Adapter Charger For Casio CTK 550 CTK 518 CT 700 CT 770 Keyboard Power Cord Charger World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. UpBright 30 days money back guarantee. 1 full year service warranty. UpBright New Global AC / DC Adapter For Casio CTK-550 CTK-518 CT-700 CT-770 CTK550 CTK518 CT700 CT770 Keyboard 9V 9VDC 9 Volts Power Supply Cord Cable PS Battery Wall Home Charger Mains PSU