EarlyBirdSavings 7 Port USB 2.0 High-Speed HUB Powered + Free AC Adapter Provides you with High Capacity 7 Ports USB Adapter HUB connection for use with computers, notebooks, and hand held computing devices that support USB Supports both port and self powered, what is more, USB Extender Hub support high speed data transfer rate up to 480Mps USB Serial Adapter Supports both port and self powered ( 5V output adapter included) Automatic swithing to power USB Adapter when power is low form the USB port on the computer Size: 81 x 46 x 24mm (L*W*T). Weight: 6.7 ounces. Material: Plastic, Metal. Color: Black