Syba 4 mSATA Slot or 4 Port SATA III PCI-e 2.0 x4 HyperDuo RAID Hard Drive Controller Card Marvell 9230 Chipset Marvell 88SE9230 chipset Marvell PCI-Express 2.0 SATA 6Gbps Controller, x4 Lane 4-Lane PCI-Express 2.0 Interface Supports Communication Bandwidth Up to 10Gbps Compliant with PCI-E 2.0 Base Specification Hard Drive Activity LED Marvell PCI-Express 2.0 SATA 6Gbps Controller, x4 Lane Up to 4 SATA/mSATA Devices with Point-to-Point Connectivity Supports Hardware RAID 0, 1, 10, and JBOD HyperDuo Mode Supports Safe Mode (Mirrored Protection), and Capacity Mode (Cost-Optimized) 4-Lane PCI-Express 2.0 Interface Supports Communication Bandwidth Up to 10Gbps 4-Lane PCI-Express 2.0 Interface Supports Communication Bandwidth Up to 10Gbps You may only connect 4 devices in total. Jumpers are used to select which ports are active.