Advantages:
 
HP-2 Hurrican Power Supply
--Fully digital microprocessor control
--Precision regulated set point voltage 0-18vdc
--2.3 amp built in overload protection
--User selectable resolution .1, .2, or .5 volt increments
--Time of day
--Stop-Watch
--Liner/ Shader presets now with 2 machine or 4 machine memory modes.
--Momentary(conventional) or Maintained(push on push off) foot switch modes. Easy one button toggle
--Non volatile memory (holds time and presets even when power is removed
--Wireless foot switch ready (foot switch under development)
--Universal input 110-240vac 50/60hz
--Excepts standard clip cord and foot pedal connections
--Volts, Amps, Speed (hz), Duty Cycle (%), ans STL(similar to follow through)
--Wipe down quality
--Easily bagged with typical machine or bottle baggies
--Power supply includes one universal mount
 
FAQ: 
I seen it stated that no pedal is included, so will i have to buy one or does it really stay on with one of the settings?
The package include a foot pedal. The function your referring to is a start stop you have to tell the machine when to start and will keep running until the pedal is pushed again to stop
Will this work with a stigma pen?
Yes,it works fine with rotary pen(should pay attention to the Voltage Range) and coil tattoo machine.
Does it work with normal tattoo machines? Or is it just for the pen machines?
It works with both
 
Does this power supple have a continuous mode (where I don’t need a foot pedal?)
Yes, there is a setting for continuous mode.
 
What will you get:
 
1 digital tattoo power supply
1 adaptor
1 power cord
1 set of holder parts
1 manual