The classic rotating design can flexibly use the extended USB interface on devices such as notebooks or set-top boxes with small space, beautiful shell, support hot swap, and low power consumption. The product is suitable for U disk, card reader, USB mouse, USB keyboard, scanner, digital camera, digital video camera, USB sound card, hard disk box and other equipment, expand 4 USB interfaces, Each power supply can be up to 480Ma, using the second-generation USB HUB controller, no driver required, plug and play, support up to 127 USB devices, all use first-class high-quality electronic devices to ensure stable operation of the product 1. USB2.0 chip, high-speed chip. 2. (Hi-speed) USB2.0 interface, the theoretical maximum rate can reach 480Mbps, and backward compatible with USB 1.1/1.0 standard specifications 3. Equipped with 4 groups of USB sockets with hot-plug function 4. Current protection function, support overload voltage and instantaneous current protection function, safe and convenient to use 5. Stable output 6. Working humidity: 10% - 90% 7. Working voltage: 5V 8. Working current: 500mA 7. Operating temperature: -20C - 75C 8. Storage temperature: -40C - 85C Support system: Windows XP/Vista/7/8/10 and MAC with USB support