1. 4x 2.5" Hot-swap SAS / SATA Hard Disk Drive Trays  

2. Overheat LED

3. Fan Failure LED

4. Drive Activity LED

5. 1x 5.25" Drive Bay Enclosure

6. 4cm Cooling Fan Subsystem

7. Color : black

5.8" (147mm) x 1.6" (40mm) x 7.9" (200mm) - With Fan
5.8" (147mm) x 1.6" (40mm) x 6.5" (165mm) - Without Fan