Features:1.This controller uses novel bi-directional high-power SCR.2.It can be very convenient adjust the current up to 25A， and solve the over current problem of the heating wire.3.The output voltage is adjusted anywhere between 0V ~ 220V for use with electrical appliances.4.It can use to such as electric stove， water heater tune thermal， lighting dimmer， small motor speed， electric iron thermostat， and achieve dimming， thermostats， pressure regulator effect.Specifications:1.Input voltage: AC 220V2.Voltage regulation: AC 0-220V3.Maximum power: 4000 W4.Current: 25A5.Resistance materials: MetalPackage included:1x High-power 4000W 220V AC SCR Voltage Regulator Motor Speed Control Controller