Individual Trainer is meant for an individual player, to grow with them as their vertical increases over time, seen HERE: -holds 5 volleyballs -raises in height via telescoping mechanism -stabilized by weighted buckets   Team Trainer edition is meant for training a whole team, seen HERE: -holds 12 volleyballs -raises/lowers via a crank system (allows for quicker adjustment between hitters) -stabilized via weight inside the base -casters (wheels) allows easy movement around the court, and allows for locking