220V Angle Grinder Governor Speed Controller 4000W Hand Drill Polishing Machine Fan Stepless Speed Control Switch   Features:   2. Voltage regulation using precision potentiometer voltage regulation, high precision, good stability. 3. New digital output voltmeter, display numbers clear and eye-catching, accurate voltage at a glance. 4. High temperature flame retardant no deformation, no discoloration, no cracking, thickened fuselage pressure resistance strong insulation material is safer.   Specifications: Type: electronic voltage regulator Input voltage: EU/UK/AU : AC220~250V US standard: AC100~120V Max power: 4000W (load power 2000W) Output voltage: EU/UK/AU : AC0~220V adjustable Us standard: AC0~120V adjustable Maximum current: 15A(load current 9A)   Tip:     Note and instructions for use: 1. The measured output voltage is an analog voltage, and the correct output voltage must be measured by connecting the load of more than 20W. 2. The input AC voltage of the product, the output is AC, the input voltage is the same as the output voltage, and cannot be used as a boost product. 3. Resistive load refers to the effect of tungsten lamp and heating wire temperature and light regulation, and inductive load refers to the effect of motor fan pressure regulation and speed regulation. 4. 4000W is the limit power of the module in the resistive load, the inductive load is 1/3 of the resistive load, the resistive load refers to the tungsten lamp, heating wire, etc., the inductive load refers to the series motor, etc., and the circuit board electronic products should be used with caution.   Shipping list: Electronic voltage regulator *1