For all standard 2.5/3.5inch Hard Disk With OTB Button 1.patent protected design to make sure the safety use of hard disk 2.support high capacity hard disk and portable to your data exchange External Interface : USB 2.0 Transmission speed: 480Mbps Product size:13.5*13.5*6.3cm Weight:400g Operating System:Microsoft Windows 98/SE/ME/2000/XP Plug and play hot swapping without rebooting Production: SMT soldering,100% testing before shipment 10pcs/outer carton Packing size:45.4*34.6*45cm Accessories screwdriver , USB cable, user's manual, colour box, screw, (2A)Power supply, power line(EU CORD,USA CORD), CD