Abstract: A controller for use in a wet environment is provided. The controller includes a manually operable input device coupled to a base housing. The manually operable input device includes a first manual input member and a second manual input member, where the second manual input member is movable relative to the first manual input member. The manually operable input device includes a sealed environment disposed at least partially within the base housing and having one or more electronic components that control at least one function of a fluid delivery device. The one or more electronic components actuate responsive to user-initiated movement of the first manual input member and user-initiated movement of the second manual input member. The first manual input member and the second manual input member are disposed at least partially outside the sealed environment.