USB2.0/ up to 480Mbps Firewire/up to 400Mbps USB2.0 and Firewire/up to 480/400Mbps USB2.0/ up to 480Mbps Operation System:Windows 98SE / ME / 2000 / XP, and Macintosh OS 9.0 or later Power Supply: Input : 100-240V~, 50-60Hz, 0.5A Output : DC + 5V, 2A, 10W . This model own 7 kinds of color and Fits 2.5-inch IDE hard drive . Well insulated . Easy to install . Fits any briefcase or notebook PC case . Powered from notebook or desktop PC (5V DC host USB power) . Pure and high-tech design with silver color; bronze aluminum, sandblasted silver/shiny color housing with transparent plastic rim