It is a Switching Power Supply/Driver, Input voltage: AC 110 ~ 220V ± 15%, Output: DC 0 ~ 24V 20A, Rated power: 480W, Ultra-quiet, high stability and high accuracy., Suitable for a variety of DC equipment, DC motor stepless speed regulation, LED stepless dimming, chemical electrolysis and plating speed regulation, research and testing, student experiments, and so on.