Your typical tattoo power supply will have between 2 and 4
amps.
Amps can be measured with your multi-meter while the fluctuation
can also be seen. Higher grade power supplies will handle
the quality of electricity in a better fashion than those that are
lower grade. Amps typically are not adjustable on a power supply
for tattooing, but there are some power supplies that will
allow for the adjustment
to be made.

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