UpBright&reg; 18V AC Adapter For Harman Kardon Model:Go + Play Wireless Portable Speaker Power Supply Cord Charger PSU (Output 18V,NOT 24V) 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 18V NEW Global AC / DC Adapter For Harman Kardon Model:Go + Play Wireless Portable Speaker Power Supply Cord Cable PS Charger Mains PSU CECCCROHS 100-240 (Output 18V,NOT 24V)