1. AVR Digital Era, AS440 Multi-Functional Digital Voltage Regulator, Life Has Been Inseparable From The Electricity, Ready To Standby For Your Life To Light Up The Luster 2. Vitreous Enamel Process 3. High Quality Terminals 4. High Quality Capacitors 5. ST Thyristor Model:AS440 Different Batches, Product Appearance, Color, And Printed Characters Will Be Different, Which Will Not Affect The Use Colour:Black Material:PCB Size:13.5x10x3.5cm Package Contents: 3 x 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.