iR4300-S2 is built in the RAID features which protects your data from HDD/SSD damage. Its RAID 5 feature provides you an affordable cost in leveraging your mass data base. iR4300-S2 provides multiple storage options. With RAID 5, a user will have the maximum protection of his/her data with allowance for a single drive failure but yet all data will be kept intact. In the RAID 0 mode, a user will have the benefit of a single massive volume for storage with high I/O speed, with sets of data being striped across the four enclosed drives. Model no. iR4300-S2 Interface 1x SATA II (3Gbps) Support Hard Drive 4x 2.5" SATA SSD/HDD(15mm) RAID Level RAID 0/1/3/5/clone/JBOD Cooling Fan 4 cm Power Supply 15-pin Power Connector LED Indicators Yes System Monitoring Fan Failure / Overheat (alarm) Operating System Windows 7 or above, Linux Certification CE & FCC Product Code EAN:4713227440127 UPC:884826504306 Packing Content iR4300-S2 (with removable drive tray enclosed x 4), Quick Installation Guide, Screws & Keys, SATA Cable, Dimension 146(W)x 42(H) x 153(L) mm Operating temperature 32° to 104° F (0° to 40° C) Storage temperature -4° to 116° F (-20° to 47° C) Relative humidity 5% to 95% noncondensing