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This power supply is both an AC to DC converter that will run a Wasp 250 or Bee 250 on AC power. It also has a DC regulator that allows for multiple DC power sources to power a Wasp or Bee 250. This power supply has a 3-pin XLR input for DC power sources that are not a regulated 28VDC, since many batteries have different voltages and/or floating voltages. It will accept any battery source that produces 18 - 38VDC and regulated to 28VDC output. It will also accept any 90 - 300V AC power source.