A unique shield generator which you can control its output strength (by [u]sing it when it is in-use).
It first appears as a level VII unknown shield (as is Iocrym veil), but you can easily tell what it is from the shield's hit-point if you have installed the Rowena's weapon and armor guide ROM.

Even with this unique feature, this shield generator is rather ineffective, because at the lowest level it's no more powerful than the plasma shield generator, and at higher levels it basically is a weaker or power-hungry substitution for the Iocrym veil, which usually you don't have any good reason to use.
Also note that if the reactor in your ship is powerful enough to install this shield generator but weaker than its maximum output, once you increase its level and overloaded, it will instantly shut itself down and you'll have no means to use it or set it to weaker levels again (until you get a better reactor, at least).