Battery-powered multi-power supply unit. power-Bank type. Feed your pedals something they like. Danelectro's vintage batteries offer superior tone to most pedals. It features four 9 volt outputs, quick battery change with easy open lid. “Kill switch” cuts power to all 4 DC outputs (no need to unplug input cables from pedals). Includes 4 DC cable with 2,1 mm barrel plugs, 4 Danelectro 9 volt vintage batteries. Small footprint.