The VooPoo DRAG 2 is now powered by the new GENE.FIT chip which adds new performance FIT modes for all sub-ohm tanks. The new FIT modes allows for optimization of battery life, flavour, or vapour production based on the mode selected. The DRAG 2 can now fire up to 177 watts and supports multiple temperature control modes. This is the external battery mod. 2 x 18650 batteries required.