Product Name: 5000W AC Voltage Regulator Dimensions: L84.8 x W70 x H40mm, excluding protruding knobs and joints. Maximum power: 5000W (resistive instantaneous load limit power), the power should be reduced for a long time, it is recommended to use within 2200W of resistive load at room temperature (key parameters, please pay attention). Efficiency: more than 90% Adjustment voltage: AC 0-220V (from high to low can be adjusted to 0, from low to high is about 20V) Note that you must connect the load first and then adjust the voltage. The thyristor is mainly used for resistive loads (electric heating wire incandescent lamps, etc.), most of the single-phase AC motors can also be used, but they are not guaranteed. For other types of loads, please confirm the buyer yourself. Operating Voltage: AC 220V Maximum Power: 5000W High Temperature FR-4 PCB Colour:silver Material:Metal Package Contents: 1 x SCR Voltage Regulator Only the above package content, other 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.