High performance: The peak power of the 220V motor of the fan speed controller is 4000W, the maximum connected power of the resistive load should not exceed 2000W, the maximum connected power of the inductive load should not exceed 500W, and the maximum connected power of the capacitive load should not exceed 300W, otherwise the product may be damaged. High-quality materials: The fan speed controller is made of thickened flame retardant plastic, which is high temperature resistant, flame retardant, anti-rust, high pressure resistant and has good durability. Perfect performance: Stepless voltage regulation of the voltage regulator, no hysteresis, no delay and fast response; Not applicable to pumps and motors with capacitors or without carbon brushes, which do not support voltage and speed reduction. Multiple protection: The speed controller is equipped with a multi-purpose socket and a working indicator, with overload protection that effectively protects the high-performance thyristor