GR3660-B3 is a full-featured simple and easy dual bay storage device, along with RAID 0 (Striping), RAID 1 (Mirroring), and JBOD three application modes, with Super Speed USB3.0 transmission interface, not only with fast transmission performance but also easily content data safety with 16TB large storage capacity or information exchange requirement. GR3660-B3 internal use SATA III (6G) chip design and transform into the most easy to use USB3.0 (5G) interface, backwards compatible with USB 2.0 and USB 1.1, not only comprehensive range of usage but also leaving your data transfer without waiting to complete an instant. USB 3.0 performance will slight decrease due to maximum and fragmented data transfer mainly due to the transmission technology. In order to allow better transmission performance, GR3660-B3 add UASP function to transfer data without waiting for previous data transfer is completed before the current transmission data movement, and improved in CPU utilization, data delay and waiting . Model No. GR3660-B3 RAID chip JM561 Host Interface USB3.0 UASP RAID Level RAID 1 / RAID 0 / JBOD Support Hard Drive 2 x 2.5"-3.5" SATA III SSD/HDD (6.0 Gb/s) Single HDD Capacity Single HDD tested up to 8TB Rebuilding YES LED Indicators Power / HDD Access / HDD Failed / Rebuilding / Connection Status Fan 1 x 4cm Fan Power Supply 12V / 4A Adaptor Certification CE / FCC Operating System Windows�Mac & Linux Packing Content Power Adaptor / USB 3.0 Cable / Quick Installation Guide / Accessory Kit Dimension 120(W) x 64(L) x 220(H) mm Net Weight 0.83Kg HDD Capacity Single HDD tested up to 8TB RAID 0 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