DDR interface design. It is easy to install and secure.External power supply provides more power. The power supply uses 2 imported large solid capacitors to make the power supply more stable.Fixed SSD copper studs are removable for easy connection to a wide range of SSDs.Fully gold plated is more wear resistant and increases electrical conductivity.size:55 x 21 x 15mmMaterial:ABScolour:blackPackage Contents:1 x Adapter CardOnly the above package content, other products are not included.Note: Light shooting 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.