Specifications:Product name: 4000W AC voltage regulatorThyristor model: BTA41600BSize: length 85*width 55*height 38mm, the interior gap of the knob is 6mm power: 4000W (resistive load limit power), the power must be lowered for a long time. The long-term resistive load is advised to be within 2000: over 90%Working voltage: AC 220VRegulating voltage: AC 0-220V (from excessive to low can be adjusted to 0, from low to immoderate is decided 10V)Terminal 12 is connected to the input 220V, and terminal 34 is attached to the load Includes: 1PCNote that the weight should be linked before voltage legislation are chiefly used for resistive a lot (heating wire incandescent lamps, etc.), and most single-phase AC motors is also used, yet there is not any make sure that they can be used for different types of loads. Buyers should confirm by way of way of themselves. The fuse is not a panacea, there's a response time, if the current is simply too large, besides burning out the fuse, the module also can burn out.