Positioning solutions are provided WherePort III Label exciter, By triggering WhereTag Label transfer is alternate "flashing" model, Then indicate the distance from a known area or key entrance. WherePort III The label exciter emits a magnetic field similar to that of a sphere; Range of about 1m (3 feet) to 7. 5m (25 feet) , It can be adjusted in the appropriate direction. If the entrance is very large (For example, the loading and unloading door is very large) Or there may be a signal occlusion area, multiple WherePort interconnectable, Expand coverage. In addition, If a tag may pass through one of multiple channels, WherePort III Can be used for marking adjacent channels or lines.