They do not say for some reason but I found this on a ebay sale
MUMS VAPES CX (Blackout Edition)
This is a hand built 20amp 110 watt variable voltage dual 18650 box
mod. 3.3-5.5 volts capable of 110 watts. .27 ohm@ 5.5 volts=110 watts.
no pics under the hood either but by the description looks like a OKR or Raptor "type" board but it is not able to reach the 6v mark. Under load at .27 you would see some battery sag. If this is what this means they are giving a honest description of what the unit will put out. But would still be nice to look under the hood lol.