How can the ScanGauge II do all of these things with only a single connection to the vehicle?
Since 1996, all cars and light trucks sold in the US have been required by law to have an On-Board-Diagnostic version 2 (OBD2 or OBD II) connector inside the passenger compartment. It is required to provide diagnostic information and allow resetting of the CHECK ENGINE light. It also provides a lot of other operating information. The ScanGauge II performs the diagnostics functions like a conventional scan tool. It also goes beyond this and uses the other data to add many more useful functions.
