Task Switch Event
The Task Switch Event element is located in the Event & Gateway drawer of the process editor palette.
The Task Switch Event element has the same function as the Task Switch Gateway element. The difference is, that a Task Switch Event element can only have one input and one output, instead of multiple ones like the parallel Task Switch Gateway. The usage of this simplified element is to have a more BPMN conform element.
See Task Switch Gateway for a more detailed description.