EFFECT PEDAL POWER SUPPLY 9V PIGTAIL adapter for 9 volt battery. Pack that includes two units, 1 with a straight connector and the other with an angled connector. Allows you to connect a 9 volt battery to the pedal's standard power input to avoid using an external power supply or having to remove the back of our pedal. Ideal for emergency situations, for pedals that do not have the option of being battery powered or to isolate specific pedals from our general power system.