*Working Voltage: AC 220V *The highest power: 2000 w *Voltage regulation: AC 50-220V *Size (L x W x H ): Approx.48 x 34 x 27 mm *Knob diameter: 19 mm *Epoxy copper clad thickness:1.6mm *Material: Semiconductor silicon controlled, Withstand voltage up to 1200 v Package Included: 1 x Speed Controller