Introducing the ToughArmor MB604SPO-B ruggedized mobile rack for hot-swapping 4x SATA/SAS SSDs and HDDs up to 9.5mm in height, and 1x Slim 12.7mm or Ultra-Slim 9.5mm CD/DVD/Blu-ray ROM optical disk drive reader for the external 5.25 bay. Featuring industrial full-metal construction inside and out, and designed for commercial applications such as military and medical systems, airborne and shipboard PCs, in-vehicle systems, servers, workstations, and mobile computer systems. Maintain optimal drive temperatures with the user-configurable 40mm cooling fan and plenty of ventilation holes throughout the enclosure. Advanced removable trays with anti-vibration protect drives in harsh environments, and built-in individual status LEDs give you drive updates at a glance. Maximize Space-Efficiency The high-density design of ToughArmor MB604SPO-B packs four 5mm-9.5mm 2...."Number of Hard Drives Supported: 4Number of Hard Drives Installed: NoNumber of Solid State Drive Supported: 4Number of Solid State Drive Installed: NoNumber of Total Expansion Bays: 5Number of 5.25 Bays: 1Number of 2.5" Bays: 4Wireless LAN: NoDrive Interface: 6Gb/s SASDrive Interface: Serial ATA/600Host Interface: Serial ATA/600Color: BlackMaterial: MetalCooling Fan: YesForm Factor: InternalCompatible Drive Bay Width: 5.25"Height: 1.6"Width: 5.7"Depth: 6.1"Weight (Approximate): 1.61 lbPackage Contents: 4 x 2.5" SAS SATA SSD/HDD (Ultra) Slim ODD Backplane Cage User Manual Screws EVA Foam Spacer Environmentally Friendly: YesEnvironmental Certification: REACHEnvironmental Certification: RoHSLimited Warranty: 3 YearPackage Contents 4 x 2.5" SAS SATA SSD/HDD (Ultra) Slim ODD Backplane Cage User Manual Screws EVA Foam Spacer "