RUIAN motor speed controller switch is a good solution to the over-current problem caused by the small resistance while electric wire core is in cooling.widely used for appliances with power less than 4000W,such as electric furnaces, water heaters, lamps, small motors and more.

Working Voltage: AC 220V
Regulating Voltage: begin from 10V, AC 10-220V
Maximum Power: 4000W (connected resistive load), the power should be reduced for a long time
Efficiency: 90% or more
Maximum Current: can reach 20A
Protection: anti-spike, surge, RC absorption (EOC)， inside 5*20 20A fuse
Package include:1Pcs Voltage Regulator

Note:
1. Must connect the load first and then adjust the voltage.
2. The loaded power can't exceed the specified maximum power, otherwise it will burn the module and electrical appliance.
3. SCR is mainly used for resistive loads (electric heating wire incandescent lamps, etc),and most single-phase AC motors can also be used, but they are not guaranteed.
4.Connect this device with lamp or home appliance or electric circuit,simply connect input terminals to either 220V wire (live wire or neutral wire) and output to load,then rotate the knob for speed, voltage, dimming, temperature control.