1. AVR Digital Era, 6GA2-491-1A Multi-Functional Digital Voltage Regulator, Life Has Been Inseparable From The Electricity, Ready To Standby For Your Life To The 2. Generator Voltage Regulation, High Voltage Stability 3. Overvoltage Protection Function, Voltage Range Can Be Adjusted 4. Low Speed Protection Function 5. 50Hz-60HZ Adjustable Wiring :X1 Voltage Input Socket: X1/1-X1/3 400V/50HZ; X1/3-X1/5 230V/50HZ; X2 External Socket; X2/1-X2/3 External Voltage Setting Potentiometer (4.7K) Suitable For IFC6 Generator Different Batches, Product Appearance, Color, And Characters Will Be Different, Which Will Not Affect The Use Colour:Green Material:PCB Size:7.3x2.6cm Package Contents: 1 * Voltage Regulator Module 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.