Aqua Creek offers two types of hand controllers; Linak and Vito.  Both brands plug easily into their brand of control box and are water resistant.   Depending on the model of lift, you will have either a two button that controls the up and down of the lift or a four button that not only controls up and down but side-to-side movement.  The hand controllers are interchangeable with either Linak or Vito control boxes.