MW Universal Deluxe AC/DC Adaptor - Multi Purpose(Tranceivers, Effect Pedals,Key Board,Radios, Tape Recorder, Calcuators, Etc.) 6 different connectors to handle many different electronic devices Polarity switch makes it easy to change polarity Polarity selector switch with indicator LED light Adjustable voltage output 5 AC adaptor plugs and a 9 volt battery plug 500mA that will power most electronic devices UL and CSA listed Reliable MW Quality Adaptor LED Indicator lets you know if it is connected correctly