100% brand new and high quality Introduction: The new bidirectional high-power SCR is adopted, and the current is up to 40A, which can well solve the over-current problem caused by the low resistance of the electric furnace wire under the condition of cooling. Very convenient to adjust the output voltage of the power supply, between 0V - 220V continuously adjustable,zero delay, zero lag. Features: 1.Application: Electric Stove,water heater temperature,light brightness,motor speed regulator,or other machine adjustment. 2.Convenient to control and operate,flexible with knobs,no need to add any components,practical and handy. 3.Adopts super power and new-design semiconductor controllable silicon,provides high efficiency. 4.1.6mm thickened copper plate,with large current design,durable and longlife. 5.Voltage boost from 60V, while reduction can down to 0V,AC 0V-220V adjustable. regulator only,other accessories demo in the picture are not included Instructions: Use the voltage regulator in series in the circuit, the voltage regulator and the lamp, electrical appliances connected in series in the circuit (that is, the lamp, electrical appliances, such as disconnect the live wire or zero line of any one, connected to the "product" terminal can be), rotating knob cap,you can adjust light,speed,temperature,voltage;Simple and convenient operation. Specification: Model: WBT-4000W Main Material: Aluminum Alloy+Plastic Type: Temperature/Brightness Adjustment Color: As pictures shown Voltage: 220V Control Motor Power: 0-4000W Efficiency: 95% Size: One Size 10x8.3x5cm(3.94x3.27x1.97in) Quantity: 1 Pc Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Regulator