Thick magnesium alloy material, big electric fan for heat dispersing, sand blasting and drawing Processed shell, copper PCB electric circuit. Specifications: 1. Use JM20337 solution 2. Aluminum alloy wire drawing processed shell, internal metal stent and big lectric fan, excellent heat dispersing, independent fan switch 3. Outside support external double USB2.0+ESATA interface, inside support various kinds SATA HDD, backup function 4. Capacity of supported HDD up to 1.5TB 5. Speed of USB2.0, 480Mbps, support hot plug 6. External 3A power supply 7. Colour: Silver, black 8. Dimension: 178mmX120mmX55mm Supported device: 1.5TB 3.5 inch IDE/SATA HDD Hardware requirements: IBM compatible PC, MAC with USB Operating system: Windows98/ME/2000/XP\MAC OS\9. X/X, Linux 2.4. X Drive software: Provide drive for windows 98, Chipset: Int1610 Host interface: USB2.0(compatible with USB1.1)/1394 Read/ write speed: 480M/S Operating environment: -40-70 celsius, humidity: 5%-95% Storage environment: -50-80 celsius Accessories: 1. DC power 2. USB2.0 cable 3. Portfolio 4. Manual 5. Warranty card 6. Set up- screw 1 set