4000W 220V AC SCR Voltage Regulator Dimmer Electric Motor Speed ControllerFeature Work Voltage AC 220VMaximum power 4000WVoltage Regulation AC 0 220VSize L85mm x W60mm x H40mm rotation hole 6mmSCR Model BT 800B Instruction The role of the product access AC 0 220V output is connected to the electric wire or electrical appliances rotary potentiometer can play speed pressure thermostat Suitable for Using the new two way high power thyristor because the design maximum current can reach 20A a good solution to the problem of over current electric wire in the case of cooling caused by the resistance is too small can easily adjust the output voltage at DC0 any adjustment between DC220V Precaution Note that the load can not exceed the specified maximum power otherwise it will burn the module and electrical Try using a resistive load inductive capacitive load power to be greatly reduced Do not try to open or modify regulator Package included 1 x 4000W 220V AC SCR Voltage Regulator Dimmer Electric Motor Speed Controller