Features: brand new and high quality High-speed USB 2.0 4 ports hub, the appearance design is very beautiful, bright and practical. With four sets of USB sockets with hot plug function. Equipped with FE11 chip, real high-speed 2.0 chip. Small in size and easy to carry. High-speed USB2.0 interface, up to 480Mbps, and backward for standard specifications Current for protection function, support overload voltage and instant current for protection function, safe and convenient to use. Support system: for Windows 95/98/2000/2003/ME/XP/Vista or for Mac OS 8.1 or above (driver needs to be installed under for Windows 95/98 system). Specifications: Item: Usb Hub Interface: USB2.0 Port No.:4 Ports Work Indicator: Blue. Item Color: Black/Blue Size: approx 8.2x3.2x1.6cm/3.2x0.63in Working Humidity: 10%-90%. Working Voltage: 5v. Working Current: 500mA Working Temperature: -20c-75c. Storage Temperature: -40c-85c Package Includes: 1 x USB Hub 1 x Usb Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.