Motor Type: AC Motor Model Number: Voltage Regulator Max Power: 6KW (max resistive load, 3KW power for normal use recommended) Efficiency: 90% Work Voltage: AC 220V design with protective case, suitable for home and factory use. Using original 41A SCR. Using 1.6 mm FR-4 PCB, reliable and safe welding design. Upgraded double capacitance circuit design (safe capacitance and metal film capacitance) protects the SCR by reducing surge and voltage spike. Brings more safety and efficiency. Adjust Voltage: AC 0-220V Please remember to connect load before you adjust the voltage. SCR in mainly used on resistive load and most single-phase motors. Please check your model series before you buy. colour: Silver Material: Metal + electronic components size: 13*6.4.7cm Knob Diameter: . 6 mm/0.24 inch Package Contents: 1 * Electronic controller Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.