Anyone knows the Nissin SpeedLite Di622 trigger voltage?

[KhronoS]

I plan to buy the Nissin SpeedLite Di622 to use it as an off-camera flash. And I have those Cactus V2 wireless flash trigger. So i need to know the voltage of this Nissin flash due to the fact that cactus triggers works only wit voltage of 12V or lower. (or so i've heard)