Venus Professional 3.5'' Dual Drive RAID Storage Enclosure has JMicron (JM539+JM391) chipset inside. It supports USB 3.0 (5Gbps) + eSATA (3Gbps) . wappable x2 Trays.(JMicron chipset) w/ EZ-RAID setup switch. RAID modes: (PM), JBOD, RAID 0 and RAID 1. Compatible to 3TB hard drives. PC/Mac compatible. Excellent Quality.