Type: Standard 28-port SAS Expander Specifications: HW Rev.: B1 FW Rev.: AA11 Dimension: 195.15 x 106.68 x 1.6 mm Chipset: LSI SASX28 Internal Port: Input from SAS HBA / RAID Card: 4-port (1x Mini-SAS), Output to Backplane: 16-port (4x Mini-SAS) External Port: Input from Host: 4-port (1x Mini-SAS), Output to JBOD: 4-port (1x Mini-SAS) Power Dissipation: 12 Watts Compatible Chassis: RM21508, RM23212, RM31212, RM31408, RM31508, RM31616, RM41416, RM41648, RM51424, RM51924, RM91250, SR107, SR108, SR109 Parts: 1 year limited Labor: 1 year limited