The hub uses plug and play design, which can be used easily without driver and additional power. This USB hub has four external USB docking ports, which helps meet the multi-port expansion requirements. With a switch, you can use it more conveniently. It is constructed of ABS material. The length of the product is 105mm, the width is 35mm and the height is 22mm. This hub is compatible for Win95 sR2/98SE/Me/2000/XP/for VISTA, for Linux 2.4 and for Mac OS 8.5 or above, and is suitable for most USB devices, such as U disk, mouse, keyboard. Item Name: Hub Material: ABS Interface: USB 2.0 Transmission Rate: Full Speed of 480Mbps, Medium Speed of 12Mbps, Low Speed of 1.5Mbps Power Supply: USB 5V/500mA Operating Temperature: 0 Degrees Celsius - 70 Degrees Celsius Storage Temperature: 10 Degrees Celsius - 90 Degrees Celsius Use/Storage Humidity Range: 10%-90% Operating System: for Win95 sR2/98SE/Me/2000/XP/for VISTA, for Linux 2.4 and for Mac OS 8.5 or Above Features: 4 Ports, High-speed Transfer, Portable Size Details: 10.5cm x 3.5cm x 2.2cm/4.13" x 1.38" x 0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hub