A set of two PocketWizard Plus III transceivers, to enable advanced, reliable triggering of flashguns (or cameras with adaptor cord) where dedicated flash operation is not required. The Plus III trigger has 32 selectable channels (16 standard, and 16 for quad-zone operation) to ensure no interference with other photographers operating in the same area. Four separate zones can be independently selected to allow single or groups of flashes or cameras to be turned on or off. Using the EC-approved 433MHz wavelegth up to a range of 500m, the Plus III operates as a transmitter or receiver, and automatically detects in which mode it needs to operate (e.g. when attached to a camera hot shoe it sets to transmitter). It can also trigger a flash and a camera simultaneously.