Specifications:Product name: 4000W AC voltage regulatorThyristor model: BTA41600BSize: length 85*width 55*height 38mm, the inner gap of the knob is 6mm power: 4000W (resistive load limit power), the flexibility should be reduced for a long time. The long-term resistive load is suggested 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 excessive is set 10V)Terminal 12 is connected to the input 220V, and terminal 34 is attached to the weight Includes: 1PCNote that the weight ought to be connected earlier than voltage law are mainly used for resistive loads (heating cord incandescent lamps, etc.), and most single-phase AC motors is also used, yet there's no make it possible for they are often used for other forms of loads. Buyers must verify by technique of themselves. The fuse isn't always a panacea, there is a response time, if the current is simply too large, besides burning out the fuse, the module also can burn out.