Factory supply computerusb2.0 hub The most practical,most flexible and stylish. No longer have to worry too crowded USB port can not be used. Maximize the use of USB expansion. Features: * Extension 4 usb interface, each supply up to 500mA; * No external power supply, easy to use; * No driver, plug and play, support hot swap; * Support USB2.0, backward compatible with 1.1/1.0, speed up to 480Mbps; * System Support: Win95 osR2/98SE/Me/2000/XP, Linux2.4andMac os8.5 or above; * Streamline design of ultra-miniature; * Supports up to 127 usb devices; * Full use of a high-quality electronic devices, to ensure job security products.