For all standard 2.5-inch Hard Disk External Interface : USB 2.0 Transmission speed: 480Mbps Product size:12.4*8.19*1.4cm Weight:58g Operating System:Microsoft Windows 98/SE/ME/2000/XP Plug and play hot swapping without rebooting Production: SMT soldering,100% testing before shipment 100pcs/outer carton Packing size:55*52*38cm Accessories screwdriver , USB cable, user's manual, colour box, screws