Description:Adds 4 USB 2.0 hi-speed ports. The Laptop USB Hub fully compliant with USB 2.0 specification Backwards compatible with USB 1.1 Mini USB 4-Port Hub support up to 127 hi-speed devices Support data transfer rate at 1.5/12/480 Mbps Individual port Over-Current protection Friendly and ergonomic design Computer USB Hub is easy to carry Provide up to 500mA per port sufficient for diverse devices Plug and Play Specification: Material: ABS shell + copper Application: computer USB interface Specifications: USB 2.0 / 1.0 compatible Working humidity: 10% - 90% Working voltage: 5V Working current: 500mA Operating temperature: -20C - 75C Storage temperature: -40C - 85C Support system: Windows 95/98/2000/2003 / ME / XP / Vista or Mac OS 8.1 or later (Windows 95/98 system to install the driver) Color: black, white Weight: 49g Cable Length: 15.7inch/40cmSpecifications:Adds 4 USB 2.0 hi-speed ports. The Laptop USB Hub fully compliant with USB 2.0 specification Backwards compatible with USB 1.1 Individual port Over-Current protection Plug and Play Package Included:1 x 4 Port High Speed Mini USB 2.0 HubNotes:Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings