Come and see our amazing products. The hub switches from 1 port to a 4-port USB.No need for external power supply, easy to use, no driver required, plug and play, support hot plug, USB interface, backward compatible with 1.1/1.0, speed up to 280MPBS, each USB interface is independent, compared to ordinary HUB interface, This independent design is more convenient to use.Welcome your size.5 3/9''x5 1/9'' Pls confirm with us about the packing info, stock color and exact production time before placing your order