Specifications: 1.USB3.0 chip, a real high-speed chip; 2.(high-speed)USB3.0 interface, theoretical maximum speed up to 5GB/S, and backward compatible with USB 2.0/1.1 standard specifications; 3.Equipped with 7 sets of USB jacks with hot-plugging function; 4.Current protection, supporting overload voltage and instantaneous current protection, safe and convenient to use; 5.Working humidity: 10%-90% 6.Working voltage: 5V 7.Operating current :500 mA 8.Operating temperature: -20C-75C 9.Storage temperature: -40C-85C Package includes: 1 * 7Ports with switch HHB Provide 7 USB interfaces. Built-in current overload short-circuit protection device. Adopt high quality electronic equipment to ensure stable operation. Automatic computer recognition and installation, no need to drive, plug and play, plug and pull. Support windows95/98 / ME / 2000 / XP/Vista, M - ac 8.6 or higher.