butterfly HUB 1.have 4 USB interface, USB2.0 and 1.1 versions are optional 2.high speed 3.high quality and cheap price. butterfly HUB*4 USB interface, USB2.0 and 1.1 versions are optional.*Support data transmission; full speed 480Mbps, medium-speed 12Mbps, low speed 1.5Mbps. *Hot-swappable, easy to use. *Can connect up to 127 peripherals. *Applicable to scanners, digital cameras, digital cameras, ...