UpBright New Global DC 9V AC / DC Adapter For Casio CTK-558 CTK-700 CTK558 CTK700 Piano Keyboard 9VDC Power Supply Cord Cable Charger Mains PSU 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.