UpBright DC 18V 12V 9V 6V Barrel Plug Power Cable Approx 6ft (1.8m) AC Adapter Extender Extension Cord Female&nbsp;Jack:&nbsp;5.5mm&nbsp;x&nbsp;2.1mm&nbsp;to&nbsp;Male&nbsp;Plug&nbsp;End: OD: 5.5mm ID: 2.1mm Tested Units. In Great Working Condition. UpBright 30 days money back guarantee. 1 full year service warranty.