RockBoard Power Ace Voltage Doubler Y Cable

High quality voltage double cable with super compact plugs. For combining voltage output of two isolated power slots (e.g. 2 x 9 V to 1 x 18 V). 2 x straight 2,1 x 5,5 mm barrel plugs (black) wired in parallel to 1 x 2,1 x 5,5 mm barrel socket (blue).