From Laguna's website....
"Max-Flo 2900 is intelligently managed by Laguna's next generation Smart Pump Technology (SPT), a major technical advancement that further improves pump performance, energy efficiency, and user friendliness.
SPT is an internal self-regulating system that tracks power consumption, hydraulics, and impeller direction to ensure powerful output and energy efficiency, so that only the required amount of power is used to operate the pump efficiently."
It has an "integrated electronic circuit board that monitors pump performance"