The Typhoon pump has 3 settings/stages to inflate your paddle board. The first stage (#1) will rapidly add air to your board by using the 2 chambers inflating the board while pushing and pulling. The second stage (#2) will use only one chamber while inflating as you push and pull. The third stage (#3) will use one chamber and only inflate the board pushing the handle down. Typically, paddlers start at #1 and move on to #2 or #3 once pumping becomes more difficult.