From the website:
Capable of travelling at six knots in the water and twelve miles per hour on land, a pair of Water Buffalos could move an entire platoon. During the Battle of the Scheldt they were invaluable, allowing Canadian infantry to conduct amphibious assaults and eventually reopen the port of Antwerp.
The box set contains:
Two LVT-4 Water Buffalo with passengers & .30 cal, .50 cal or 20mm Polsten MG options.