1. The X825 case is dedicated for 4 B type 2.5-inch SATA HDD/Ssd storage expansion card. 2. You can make your own cloud storage or private storage system . 3. The x825 expansion board enclosure provides a complete storage solution for the latest 4b. 4. x825 enclosure It supports 2.5-inch SATA Drive (HDD)/Solid State Drive (SSD) up to 4TB. The X825 card has only a 2.5-inch SATA HDD/ interface . Update to usb3.1 gen1 port 5. New X825-C8 chassis for x825 v2.0 & x735 & pi 4, now neither X825- chassis nor X825-C7 chassis are compatible with x825 v2.0. Product Name: 4B Expansion Board Shell Model: X825-C8 Applicability: X825 only works with 4 Model B! Product size: 113x95x55mm Colour:black Material:PCB+Metal Package Contents: 1 x x825-C8 shell 1 x cooling fan 1 x switch button 1 x screw pack 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.