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 Light Up The Luster 2. British WELWYN Glass Resistance, Can Work Temperature In 55°- 350° 3. American Potentiometer, Smooth 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%RMS (Engine Speed Change Within 4%) Different Batches, Product Appearance, Color, And Printed Characters Be Different, Which 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.