1、With the flame retardant metal shell,it is more safe for you to use. 2、No hysteresis, no delay, with top voltage absorption circuit to effectively protect high power thyristor. 3、Anti-surge, anti-spike, RC absorption multiple protection. 4、The controller can adjust temperature,speed,light and voltage. 5、Wide application.The controller can be used for household appliances, industrial appliances, scientific test equipment, factories, schools and other electrical equipment. Features: With the flame retardant metal shell,it is more safe for you to use. No hysteresis, no delay, with top voltage absorption circuit to effectively protect high power thyristor. Anti-surge, anti-spike, RC absorption multiple protection. The controller can adjust temperature,speed,light and voltage. Wide application.The controller can be used for household appliances, industrial appliances, scientific test equipment, factories, schools and other electrical equipment. Specification: Model:WBT-4000W Plug:AU Plug 220VAC Output Voltage:0~220V(Adjustable) Maximum Wattage: 4000W Rated Current: 9A Maximum Current: 18A SCR model: BTA41-600B/800B Package List: 1*Electronic Controller   Note: Please kindly make a note if you need any plug adapter. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.