Self-contained mini Trommel that you can work any ware you go. Has an 85-gallon tank and runs off a battery or generator set. a 1-inch pump for water ( Not included ). You can run a steady feed over our Stanford sluice. All you need to do is leave the tank and the rest is preset to start running the product. This unit is designed to run where you may be limited on water, but can also be used where you have an abundance of it. Since it is on its own tank, it is not running back into the creek or stream you are working near.