Starrett wireless SPC data transfer components are used with most handheld metrology tools that have a serial output SPC port. These components are rechargeable and operate using low-power consumption. Transmitters and dongles maintain tool resistance in harsh and washdown environments. These components work with a gateway receiver that connects to a personal computer. External transmitters, also called backpack transmitters, are used to extend the range in which they can be used. These components offer highly secure transmission over long distances and are commonly used in defense and aerospace manufacturing, energy sector inspection regimens, and other large facilities where traceability and security is critical.