It can be very convenient adjust the current up to 25A, and solve the over current problem of the heating wire. The output voltage is adjusted anywhere between 50V ~ 220V for use with electrical appliances. 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.The Voltage Regulator must be connectted to the load before the regulator. SCR is mainly used for resistive loads (incandescent electric wire, etc.), most of the single-phase AC motor can, but can not guarantee, other types of loads buyer to confirm their own. Fuse is not a panacea, there is reaction time, if the current is too large, in addition to burn the fuse, the module may also be burned. Attention to fitting plastic cover due to the installation of the housing, can not be completely open, screwdriver to tighten the side with the point, the other to be careful when opened, excessive force easily snapping the lid, express transportation may also crushed for wearing parts, but It does not affect the module.