Components Specification Dimensions(mm) 437.5mm x 650mm x 176.5mm, standard 19" rackmount chassis. Materials 1.0mm SGCC Zinc-Coated Steel. Backplane 6Gb/s MINI SAS backplane, with temperature control chipset. / 12Gb/s MINI SAS backplane, with temperature control chipset. / 6Gb/s Expander backplane, with temperature control chipset. / 12Gb/s Expander backplane, with temperature control chipset. Drivers bay 24 x 3.5' hot-swappable SATA (II or III) / SAS (II or III) 6Gb/s drive bays. Cooling Fan Standard quotation with 3pcs 12038H ball bearing fans. PSU form factor Standard PS2 power supply or redundant power supply. M/B form factor Support MAX 12" x 13" motherboard. Epansion space 7 full-height PCI/PCIE expansion slots. Connector Two front accessible USB2.0 ports(Optional USB3.0). System Control Power LED*1 Reset*1 Power SW*1 HDD LED*1 NIC LED*2 UID LED*1 UID SW*1ï OH/FAN Fail LED*1 Power Fail LED*1. Applicarion Cloud storage, cloud computing, big data, security monitoring, LOTetc. Product Features: 1.Conformed with EMC design standard to prevent from electromagnetic interference. 2.Support motherboard size up to 12" x 13", and 24*3.5"HDD bays, Standard PS2 power supply or redundant power supply. 3.The chassis has good ventilation system 3pcs 12038H ball bearing fans to make sure the system work steadily.