Color : Black Host Interface : 4 x miniSAS HD (SFF-8643) Drive Fit : 16 x 2.5" SAS/SATA SSD and HDD (7mm drive height) Device Fit : 2 x external 5.25" bay Transfer Rate : SATA up to 6 Gb/sec. (depending on hard drive speed) SAS up to 12Gbps (Single Channel) Power Input : 4 x 15pin SATA power port Insert and Extract connection Via : Direct SATA hard drive connection Structure : Metal Drive Cooling : Single 80mm rear cooling fan Metal heat dispersion Power Indicator : Solid green LED HDD Access Indicator : Flashing green LED Item Dimension (L inchxW inchxH inch) 8 x 6 x 9