1. performance: The speed controller has a peak power of 4000W. The maximum power for resistive loads must not exceed 2000W, for inductive loads it must not exceed 500W, and for capacitive loads it must not exceed 300W, otherwise it may damage the product. 2. Multiple safety protection measures: Builtin overload protection effectively safeguards the speed controller from surges and voltage spikes. The voltage regulator is equipped with a multipurpose socket and a power indicator, featuring overload protection to effectively protect the performance thyristor from surges, voltage spikes, and RC absorption. 3. speed adjustment: Input voltage: AC 220V, output voltage: AC 0220V (the voltmeter will not function if the voltage is below 10V). Adjustable voltage range: AC 0220V. Rated current: 10A, limit current: 18A. The speed controller has a peak power of 4000W. Frequency: 50Hz/60Hz. 4. quality materials: Our speed controller is made of thick flameretardant ABS material. The input voltage of this product is AC, and the output is also AC. The maximum input value equals the maximum output value. It reduces voltage and power and does not have a boost function. This product is not suitable for applications requiring precise or very low speeds.