Specifications:Product name: 4000W AC voltage regulatorThyristor model: BTA41600BSize: length 85*width 55*height 38mm, the internal gap of the knob is 6mm power: 4000W (resistive load limit power), the flexibility needs to be reduced for an extended time. The long-term resistive load is suggested to be inside 2000: over 90%Working voltage: AC 220VRegulating voltage: AC 0-220V (from high to low can be adjusted to 0, from low to high is ready 10V)Terminal 12 is connected to the input 220V, and terminal 34 is attached to the burden Includes: 1PCNote that the weight needs to be linked before voltage legislation are mainly used for resistive loads (heating wire incandescent lamps, etc.), and most single-phase AC motors can be used, but there isn't any ensure that they are often used for different varieties of loads. Buyers must verify through technique of themselves. The fuse isn't a panacea, there's a reaction time, if the present is just too large, in addition to burning out the fuse, the module may also burn out.