Using the ability brings you a StuH 42 medium tank from the off-map call-in point. The StuH is mostly an anti-infantry and anti-building tank with in-direct fire (artillery-like shells). It has a fixed gun, low amount of hitpoints, and decent front armor so you should always try to point your front towards your enemy as StuH is much weaker from the sides and can't shoot from there. The StuH slaughters infantry without elite armor in no-time, such as American riflemen or British sappers for example. The StuH has decent damage against units with elite armor as well though.