Black USB 2.0 Single Port to 4-Port 480 Mbps USB Hub Adapter 4 Port USB 2.0 Hub w/2.5 ft Cable Four downstream ports support high-speed (480Mbps), full-speed (12Mbps), and low-speed (1.5Mbps) Data transfer speeds up to 480 Mbps / Supports up to 127 devices by daisy-chaining multiple hubs Some power-intense USB devices may require a AC-Powered USB hub