Specifications: 1. Provide4 or 7 USB interface, 2. Usb HUB 3. The built-in current overload short circuit protection; 4. High quality electronic components, guarantee the stability of operation; 5. Automatic identification of computer installation, no driver, plug and play, plug; 6. Support: windows95/98 / ME / 2000 / XP/Vista, Mac 8.6 or later With LED lights, work status directly visible. 7, Lovely, elegant appearance, easy to use Feature: 1. The USB2.0 chip, real high-speed chips. 2. (the Hi - speed) USB2.0 interface, the theory of the highest rate of up to 480 MBPS, and backwards compatible USB standard 1.1/1.0 3. Equipped with four groups of USB holes with the function of hot plug 4. The current protection function, support overload voltage and instantaneous electric current protection function, the use of safe and convenient 5. Working lamp 6. Work humidity: 10% to 90% 7. Working voltage: 5 v 8. Working current: 500 ma 9. Working temperature: - 20 c - 75 c 10. Storage temperature: - 40 c - 85 c 11. Support system: Windows 2000/2003 / ME / 95/98 / XP/Vista Mac OS 8.1 or above (under Windows 95/98 system need to install driver) Package includes: 1pcs*4ports USB-HUB Or 1pcs*7ports USB-HUB