Silicon Power Armor A70 Portable 640 GB USB 2.0 External Hard Drive SP640GBPHDA70S2R (Red) In compliance with US military grade MIL-STD-810F 516.5 procedures IV (Transit drop test) In compliance with IEC529 IPX7 water proof test Dust and pressure proof LED status indicator light Interface: USB 2.0 / 1.1 Delicate cable storage design Supported operating systems: Windows 7, Windows Vista, WinXP, Win2000, Mac 10.3.X above, Linux 2.6.X above SP Widget free download software features seven main functions to maximize your SP Portable Hard Drive