Methods, devices, and systems for information selection in a wireless communication system are provided. The base receives a container of a flowable material. The shifting switch is connected with a connecting linkage, and the connecting linkage is connected with a driving switch, two radial through holes perpendicular to each other and two radial half through holes perpendicular to each other are formed on the shifting switch, and a protruding stopping element is disposed on the shifting switch. In a further aspect of this embodiment, the change in the characteristic of the icon can include a change in the color or other visual characteristic of the icon, and the color or other visual characteristic of the icon can correspond directly to instructions to the pilot for actions suggested or required as a result of the current engine operational state.