O.P., please disregard incorrect information above. the max voltage output, while unlisted, maxes out with the available coils at around 7.2 volts, I would estimate the device could go to 7.5 or 8 volts, but would need further testing with a rebuildable.

Also, a 510 adapter is/will be available by the time you read this.

Same engine as Swag 2 or Forza, also by Vaporesso.