Specifications:Product name: 4000W AC voltage regulatorThyristor model: BTA41600BSize: size 85*width 55*height 38mm, the interior gap of the knob is 6mm power: 4000W (resistive load limit power), the power should be decreased for an extended time. The long-term resistive load is advised to be inside 2000: over 90%Working voltage: AC 220VRegulating voltage: AC 0-220V (from excessive to low would be adjusted to 0, from low to excessive is ready 10V)Terminal 12 is hooked up to the enter 220V, and terminal 34 is attached to the weight Includes: 1PCNote that the burden needs to be related before voltage regulation are mainly used for resistive plenty (heating twine incandescent lamps, etc.), and maximum single-phase AC motors can also be used, yet there is not any make sure that they can be used for various sorts of loads. Buyers should confirm via themselves. The fuse is not a panacea, there is a reaction time, if the present is simply too large, in addition to burning out the fuse, the module can even burn out.