As pedal designs changed and it became more common for digital pedals to require isolation, musicians needed something other than 9V DC which the 1 Spot offers to they could get more power and versatility which the 1 Spot Pro now can offer, using the same proprietary technology as in the 1 Spot. 12 fully isolated outputs 5 voltage options provide power for virtually any effect pedal Variable 4-9Vdc, 12 Vdc, 18 Vdc, 9Vdc and 9Vac Includes brackets for mounting under Pedaltrain® pedalboards Switchable Worldwide Input Voltage Cables and converter plugs included: (2) DC26 (5.5x2.1mm barrel plugs, 26 (660mm) - Purple (2) DC22 (5.5x2.1mm barrel plugs 22\" (559mm) - Blue (4) DC18 (5.5x2.1mm barrel plugs 18\" (457mm) - White (3) DC12 (5.5x2.1mm barrel plugs 12\" (305mm) - Yellow (1) AC21 (5.5x2.5mm barrel plugs 21\" (533mm) - Red Converter Plugs: (1) CL6 - Green (1) CYR - Red (2) C35 - Black (1) CBAT - Black battery clip"