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A fan speed control wall switch is a specialized switching device used to change the speed of a fan. It is installed on the wall and adjusts the fan's power supply voltage, phase, or frequency to regulate the fan speed, thereby controlling the fan's rotation speed and allowing users to obtain different levels of airflow.

From the perspective of product design, electrical parameters, and load matching, the common operating power range of fan speed control wall switches is typically: Minimum power approximately 75W Maximum power approximately 500W