The USB3.0 hub is an external one (requires a free USB3.0 port on the computer). Data transmission and power supply through USB3.0 data cable, add four ultra-fast USB3.0 ports to your computer. Support high-bandwidth peripherals such as USB3.0 disk drives, high-resolution cameras, video surveillance cameras, digital video cameras, and multi-channel audio. The transmission speed of USB3.0 is 5.0Gb/s (the actual speed is 80MB/s), and it supports USB2.0 and USB1.1 downwards. Can be used with a wide range of USB devices, and allows multiple USB3.0 and legacy USB devices to operate simultaneously. The built-in current protection device can effectively protect the connected equipment and the Hub itself in case of sudden power on. The input end adopts a solid USB3.0 B female socket, which effectively guarantees the USB3.0 transmission signal. True USB3.0 1. Aluminum alloy material, good texture, with buttons, each switch controls a USB port, with blue light display 2. External USB3.0 four-port hub. plug and play 3. Built-in current protection device to effectively protect the connected equipment and the HUB itself 4. USB3.0 data line power supply, each interface can supply 900mA current. The power distribution can enhance the current to that the large power consumption equipment can also work at the same time 5. Support USB3.0 to serial port interface setting, transmission to 5Gb/s, and support USB2.0/USB1.1 downward. 6. Support hot swap Product Model: -308B Transmission rate: 5Gbps Whether there is an external power supply: there is an external power supply Number of ports: 4 Cable length: 1.2m Interface: USB 3.0 Plug Type: EU Plug, it applies to Indonesia, Germany, France, , Italy and so on voltage: AC100-240V size: 10.3 x 4.3 x 1.9cm Material: aluminum alloy colour: A-black Package Contents: 1 x 4 porthub (3.0) 1 x plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.