1. AVR Digital Era, SR7-2G Multi-Functional Digital Voltage Regulator, Life Has Been Inseparable From The Electricity, Ready To Standby For Your Life To The 2. British WELWYN Glass Resistance, Can Work Temperature In 55- 350 3. American Potentiometer, Adjustment, Not Easy To Damage; 100% IC 4. Resistance, High Precision, Wide Range Of Operating Temperature, Small Drift, Good Stability 5. Using High-Quality Capacitors, Good Parameter Consistency And High Reliability; Model:SR7-2G Detection And Power Input:80-350V AC Single-Phase Two-Wire Power Input:Voltage 50-270V AC(1,2) Frequency 50/60HZ Magnetic Field Output:Voltage 220V AC, Maximum 63V DC When Input, Current Continuous 6A Pressure Regulation Accuracy:Less than 1% (Engine Speed Change Within 4%) Different Batches, Product Appearance, Color, And Characters Will Be Different, Which Will Not Affect The Use Colour:Black Material:PCB Size:9.5x8.9x3.6cm Package Contents: 1 * Voltage Regulator Module 1 * English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.