Includes one RollNRack unit, one Power Roller unit, a spare battery pack and charger, and one extra coupling jaw set. Designed for maximum efficiency, these are the components for the ideal system. One firefighter uses the Power Roller unit to drain and roll a length of hose, then rocks the roll out and continues on to the next length of hose. Another firefighter rocks that roll onto the RollNRack unit, wheels it to the rig, and loads it at the same time with another firefighter. A three man hose operation safely functions like six or seven!