These small power supplies pack a hefty punch. Offering the TRUE direct current that a tattoo machine needs as well as the superiority of a linear voltage regulator. The boxes offer up to 13 volts and 5 continuous amps and at only 3"x3"x1.5" they're easy to move around with you as you're tattooing and take with you while traveling. Disconnect from the shoddy power grid and experience how tattoo machines were meant to run. If you're looking for something more personal I always welcome custom orders.